261256840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{853}}^1$

素因数の和:927

約数の個数: 128

約数和(自身を含む): 688665600

約数和(自身を除く): 427408760

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 31, 38, 40, 52, 62, 65, 76, 95, 104, 124, 130, 152, 155, 190, 247, 248, 260, 310, 380, 403, 494, 520, 589, 620, 760, 806, 853, 988, 1178, 1235, 1240, 1612, 1706, 1976, 2015, 2356, 2470, 2945, 3224, 3412, 4030, 4265, 4712, 4940, 5890, 6824, 7657, 8060, 8530, 9880, 11089, 11780, 15314, 16120, 16207, 17060, 22178, 23560, 26443, 30628, 32414, 34120, 38285, 44356, 52886, 55445, 61256, 64828, 76570, 81035, 88712, 105772, 110890, 129656, 132215, 153140, 162070, 210691, 211544, 221780, 264430, 306280, 324140, 343759, 421382, 443560, 502417, 528860, 648280, 687518, 842764, 1004834, 1053455, 1057720, 1375036, 1685528, 1718795, 2009668, 2106910, 2512085, 2750072, 3437590, 4019336, 4213820, 5024170, 6531421, 6875180, 8427640, 10048340, 13062842, 13750360, 20096680, 26125684, 32657105, 52251368, 65314210, 130628420, 261256840]

約数ペア:

[(1, 261256840), (2, 130628420), (4, 65314210), (5, 52251368), (8, 32657105), (10, 26125684), (13, 20096680), (19, 13750360), (20, 13062842), (26, 10048340), (31, 8427640), (38, 6875180), (40, 6531421), (52, 5024170), (62, 4213820), (65, 4019336), (76, 3437590), (95, 2750072), (104, 2512085), (124, 2106910), (130, 2009668), (152, 1718795), (155, 1685528), (190, 1375036), (247, 1057720), (248, 1053455), (260, 1004834), (310, 842764), (380, 687518), (403, 648280), (494, 528860), (520, 502417), (589, 443560), (620, 421382), (760, 343759), (806, 324140), (853, 306280), (988, 264430), (1178, 221780), (1235, 211544), (1240, 210691), (1612, 162070), (1706, 153140), (1976, 132215), (2015, 129656), (2356, 110890), (2470, 105772), (2945, 88712), (3224, 81035), (3412, 76570), (4030, 64828), (4265, 61256), (4712, 55445), (4940, 52886), (5890, 44356), (6824, 38285), (7657, 34120), (8060, 32414), (8530, 30628), (9880, 26443), (11089, 23560), (11780, 22178), (15314, 17060), (16120, 16207)]