21007160

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:372

約数の個数: 64

約数和(自身を含む): 50371200

約数和(自身を除く): 29364040

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 131, 152, 190, 211, 262, 380, 422, 524, 655, 760, 844, 1048, 1055, 1310, 1688, 2110, 2489, 2620, 4009, 4220, 4978, 5240, 8018, 8440, 9956, 12445, 16036, 19912, 20045, 24890, 27641, 32072, 40090, 49780, 55282, 80180, 99560, 110564, 138205, 160360, 221128, 276410, 525179, 552820, 1050358, 1105640, 2100716, 2625895, 4201432, 5251790, 10503580, 21007160]

約数ペア:

[(1, 21007160), (2, 10503580), (4, 5251790), (5, 4201432), (8, 2625895), (10, 2100716), (19, 1105640), (20, 1050358), (38, 552820), (40, 525179), (76, 276410), (95, 221128), (131, 160360), (152, 138205), (190, 110564), (211, 99560), (262, 80180), (380, 55282), (422, 49780), (524, 40090), (655, 32072), (760, 27641), (844, 24890), (1048, 20045), (1055, 19912), (1310, 16036), (1688, 12445), (2110, 9956), (2489, 8440), (2620, 8018), (4009, 5240), (4220, 4978)]