256668880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:221

約数の個数: 160

約数和(自身を含む): 674956800

約数和(自身を除く): 418287920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 47, 52, 59, 65, 80, 89, 94, 104, 118, 130, 178, 188, 208, 235, 236, 260, 295, 356, 376, 445, 470, 472, 520, 590, 611, 712, 752, 767, 890, 940, 944, 1040, 1157, 1180, 1222, 1424, 1534, 1780, 1880, 2314, 2360, 2444, 2773, 3055, 3068, 3560, 3760, 3835, 4183, 4628, 4720, 4888, 5251, 5546, 5785, 6110, 6136, 7120, 7670, 8366, 9256, 9776, 10502, 11092, 11570, 12220, 12272, 13865, 15340, 16732, 18512, 20915, 21004, 22184, 23140, 24440, 26255, 27730, 30680, 33464, 36049, 41830, 42008, 44368, 46280, 48880, 52510, 54379, 55460, 61360, 66928, 68263, 72098, 83660, 84016, 92560, 105020, 108758, 110920, 136526, 144196, 167320, 180245, 210040, 217516, 221840, 246797, 271895, 273052, 288392, 334640, 341315, 360490, 420080, 435032, 493594, 543790, 546104, 576784, 682630, 720980, 870064, 987188, 1087580, 1092208, 1233985, 1365260, 1441960, 1974376, 2175160, 2467970, 2730520, 2883920, 3208361, 3948752, 4350320, 4935940, 5461040, 6416722, 9871880, 12833444, 16041805, 19743760, 25666888, 32083610, 51333776, 64167220, 128334440, 256668880]

約数ペア:

[(1, 256668880), (2, 128334440), (4, 64167220), (5, 51333776), (8, 32083610), (10, 25666888), (13, 19743760), (16, 16041805), (20, 12833444), (26, 9871880), (40, 6416722), (47, 5461040), (52, 4935940), (59, 4350320), (65, 3948752), (80, 3208361), (89, 2883920), (94, 2730520), (104, 2467970), (118, 2175160), (130, 1974376), (178, 1441960), (188, 1365260), (208, 1233985), (235, 1092208), (236, 1087580), (260, 987188), (295, 870064), (356, 720980), (376, 682630), (445, 576784), (470, 546104), (472, 543790), (520, 493594), (590, 435032), (611, 420080), (712, 360490), (752, 341315), (767, 334640), (890, 288392), (940, 273052), (944, 271895), (1040, 246797), (1157, 221840), (1180, 217516), (1222, 210040), (1424, 180245), (1534, 167320), (1780, 144196), (1880, 136526), (2314, 110920), (2360, 108758), (2444, 105020), (2773, 92560), (3055, 84016), (3068, 83660), (3560, 72098), (3760, 68263), (3835, 66928), (4183, 61360), (4628, 55460), (4720, 54379), (4888, 52510), (5251, 48880), (5546, 46280), (5785, 44368), (6110, 42008), (6136, 41830), (7120, 36049), (7670, 33464), (8366, 30680), (9256, 27730), (9776, 26255), (10502, 24440), (11092, 23140), (11570, 22184), (12220, 21004), (12272, 20915), (13865, 18512), (15340, 16732)]