278327920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:243

約数の個数: 160

約数和(自身を含む): 734952960

約数和(自身を除く): 456625040

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 89, 97, 104, 124, 130, 155, 178, 194, 208, 248, 260, 310, 356, 388, 403, 445, 485, 496, 520, 620, 712, 776, 806, 890, 970, 1040, 1157, 1240, 1261, 1424, 1552, 1612, 1780, 1940, 2015, 2314, 2480, 2522, 2759, 3007, 3224, 3560, 3880, 4030, 4628, 5044, 5518, 5785, 6014, 6305, 6448, 7120, 7760, 8060, 8633, 9256, 10088, 11036, 11570, 12028, 12610, 13795, 15035, 16120, 17266, 18512, 20176, 22072, 23140, 24056, 25220, 27590, 30070, 32240, 34532, 35867, 39091, 43165, 44144, 46280, 48112, 50440, 55180, 60140, 69064, 71734, 78182, 86330, 92560, 100880, 110360, 112229, 120280, 138128, 143468, 156364, 172660, 179335, 195455, 220720, 224458, 240560, 267623, 286936, 312728, 345320, 358670, 390910, 448916, 535246, 561145, 573872, 625456, 690640, 717340, 781820, 897832, 1070492, 1122290, 1338115, 1434680, 1563640, 1795664, 2140984, 2244580, 2676230, 2869360, 3127280, 3479099, 4281968, 4489160, 5352460, 6958198, 8978320, 10704920, 13916396, 17395495, 21409840, 27832792, 34790990, 55665584, 69581980, 139163960, 278327920]

約数ペア:

[(1, 278327920), (2, 139163960), (4, 69581980), (5, 55665584), (8, 34790990), (10, 27832792), (13, 21409840), (16, 17395495), (20, 13916396), (26, 10704920), (31, 8978320), (40, 6958198), (52, 5352460), (62, 4489160), (65, 4281968), (80, 3479099), (89, 3127280), (97, 2869360), (104, 2676230), (124, 2244580), (130, 2140984), (155, 1795664), (178, 1563640), (194, 1434680), (208, 1338115), (248, 1122290), (260, 1070492), (310, 897832), (356, 781820), (388, 717340), (403, 690640), (445, 625456), (485, 573872), (496, 561145), (520, 535246), (620, 448916), (712, 390910), (776, 358670), (806, 345320), (890, 312728), (970, 286936), (1040, 267623), (1157, 240560), (1240, 224458), (1261, 220720), (1424, 195455), (1552, 179335), (1612, 172660), (1780, 156364), (1940, 143468), (2015, 138128), (2314, 120280), (2480, 112229), (2522, 110360), (2759, 100880), (3007, 92560), (3224, 86330), (3560, 78182), (3880, 71734), (4030, 69064), (4628, 60140), (5044, 55180), (5518, 50440), (5785, 48112), (6014, 46280), (6305, 44144), (6448, 43165), (7120, 39091), (7760, 35867), (8060, 34532), (8633, 32240), (9256, 30070), (10088, 27590), (11036, 25220), (11570, 24056), (12028, 23140), (12610, 22072), (13795, 20176), (15035, 18512), (16120, 17266)]