21457355780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{755009}}^1$

素因数の和:755061

約数の個数: 72

約数和(自身を含む): 54224818200

約数和(自身を除く): 32767462420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 812, 980, 1015, 1421, 2030, 2842, 4060, 5684, 7105, 14210, 28420, 755009, 1510018, 3020036, 3775045, 5285063, 7550090, 10570126, 15100180, 21140252, 21895261, 26425315, 36995441, 43790522, 52850630, 73990882, 87581044, 105701260, 109476305, 147981764, 153266827, 184977205, 218952610, 306533654, 369954410, 437905220, 613067308, 739908820, 766334135, 1072867789, 1532668270, 2145735578, 3065336540, 4291471156, 5364338945, 10728677890, 21457355780]

約数ペア:

[(1, 21457355780), (2, 10728677890), (4, 5364338945), (5, 4291471156), (7, 3065336540), (10, 2145735578), (14, 1532668270), (20, 1072867789), (28, 766334135), (29, 739908820), (35, 613067308), (49, 437905220), (58, 369954410), (70, 306533654), (98, 218952610), (116, 184977205), (140, 153266827), (145, 147981764), (196, 109476305), (203, 105701260), (245, 87581044), (290, 73990882), (406, 52850630), (490, 43790522), (580, 36995441), (812, 26425315), (980, 21895261), (1015, 21140252), (1421, 15100180), (2030, 10570126), (2842, 7550090), (4060, 5285063), (5684, 3775045), (7105, 3020036), (14210, 1510018), (28420, 755009)]