20673469880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1\times {\mathrm{3617}}^1$

素因数の和:3921

約数の個数: 128

約数和(自身を含む): 53922672000

約数和(自身を除く): 33249202120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 137, 140, 149, 274, 280, 298, 548, 596, 685, 745, 959, 1043, 1096, 1192, 1370, 1490, 1918, 2086, 2740, 2980, 3617, 3836, 4172, 4795, 5215, 5480, 5960, 7234, 7672, 8344, 9590, 10430, 14468, 18085, 19180, 20413, 20860, 25319, 28936, 36170, 38360, 40826, 41720, 50638, 72340, 81652, 101276, 102065, 126595, 142891, 144680, 163304, 202552, 204130, 253190, 285782, 408260, 495529, 506380, 538933, 571564, 714455, 816520, 991058, 1012760, 1077866, 1143128, 1428910, 1982116, 2155732, 2477645, 2694665, 2857820, 3468703, 3772531, 3964232, 4311464, 4955290, 5389330, 5715640, 6937406, 7545062, 9910580, 10778660, 13874812, 15090124, 17343515, 18862655, 19821160, 21557320, 27749624, 30180248, 34687030, 37725310, 69374060, 73833821, 75450620, 138748120, 147667642, 150901240, 295335284, 369169105, 516836747, 590670568, 738338210, 1033673494, 1476676420, 2067346988, 2584183735, 2953352840, 4134693976, 5168367470, 10336734940, 20673469880]

約数ペア:

[(1, 20673469880), (2, 10336734940), (4, 5168367470), (5, 4134693976), (7, 2953352840), (8, 2584183735), (10, 2067346988), (14, 1476676420), (20, 1033673494), (28, 738338210), (35, 590670568), (40, 516836747), (56, 369169105), (70, 295335284), (137, 150901240), (140, 147667642), (149, 138748120), (274, 75450620), (280, 73833821), (298, 69374060), (548, 37725310), (596, 34687030), (685, 30180248), (745, 27749624), (959, 21557320), (1043, 19821160), (1096, 18862655), (1192, 17343515), (1370, 15090124), (1490, 13874812), (1918, 10778660), (2086, 9910580), (2740, 7545062), (2980, 6937406), (3617, 5715640), (3836, 5389330), (4172, 4955290), (4795, 4311464), (5215, 3964232), (5480, 3772531), (5960, 3468703), (7234, 2857820), (7672, 2694665), (8344, 2477645), (9590, 2155732), (10430, 1982116), (14468, 1428910), (18085, 1143128), (19180, 1077866), (20413, 1012760), (20860, 991058), (25319, 816520), (28936, 714455), (36170, 571564), (38360, 538933), (40826, 506380), (41720, 495529), (50638, 408260), (72340, 285782), (81652, 253190), (101276, 204130), (102065, 202552), (126595, 163304), (142891, 144680)]