28371980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1$

素因数の和:184

約数の個数: 144

約数和(自身を含む): 79634016

約数和(自身を除く): 51262036

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 17, 20, 26, 28, 34, 35, 49, 52, 65, 68, 70, 85, 91, 98, 119, 130, 131, 140, 170, 182, 196, 221, 238, 245, 260, 262, 340, 364, 442, 455, 476, 490, 524, 595, 637, 655, 833, 884, 910, 917, 980, 1105, 1190, 1274, 1310, 1547, 1666, 1703, 1820, 1834, 2210, 2227, 2380, 2548, 2620, 3094, 3185, 3332, 3406, 3668, 4165, 4420, 4454, 4585, 6188, 6370, 6419, 6812, 7735, 8330, 8515, 8908, 9170, 10829, 11135, 11921, 12740, 12838, 15470, 15589, 16660, 17030, 18340, 21658, 22270, 23842, 25676, 28951, 30940, 31178, 32095, 34060, 43316, 44540, 47684, 54145, 57902, 59605, 62356, 64190, 77945, 83447, 108290, 109123, 115804, 119210, 128380, 144755, 155890, 166894, 202657, 216580, 218246, 238420, 289510, 311780, 333788, 405314, 417235, 436492, 545615, 579020, 810628, 834470, 1013285, 1091230, 1418599, 1668940, 2026570, 2182460, 2837198, 4053140, 5674396, 7092995, 14185990, 28371980]

約数ペア:

[(1, 28371980), (2, 14185990), (4, 7092995), (5, 5674396), (7, 4053140), (10, 2837198), (13, 2182460), (14, 2026570), (17, 1668940), (20, 1418599), (26, 1091230), (28, 1013285), (34, 834470), (35, 810628), (49, 579020), (52, 545615), (65, 436492), (68, 417235), (70, 405314), (85, 333788), (91, 311780), (98, 289510), (119, 238420), (130, 218246), (131, 216580), (140, 202657), (170, 166894), (182, 155890), (196, 144755), (221, 128380), (238, 119210), (245, 115804), (260, 109123), (262, 108290), (340, 83447), (364, 77945), (442, 64190), (455, 62356), (476, 59605), (490, 57902), (524, 54145), (595, 47684), (637, 44540), (655, 43316), (833, 34060), (884, 32095), (910, 31178), (917, 30940), (980, 28951), (1105, 25676), (1190, 23842), (1274, 22270), (1310, 21658), (1547, 18340), (1666, 17030), (1703, 16660), (1820, 15589), (1834, 15470), (2210, 12838), (2227, 12740), (2380, 11921), (2548, 11135), (2620, 10829), (3094, 9170), (3185, 8908), (3332, 8515), (3406, 8330), (3668, 7735), (4165, 6812), (4420, 6419), (4454, 6370), (4585, 6188)]