80215940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{81853}}^1$

素因数の和:81876

約数の個数: 36

約数和(自身を含む): 195958476

約数和(自身を除く): 115742536

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 81853, 163706, 327412, 409265, 572971, 818530, 1145942, 1637060, 2291884, 2864855, 4010797, 5729710, 8021594, 11459420, 16043188, 20053985, 40107970, 80215940]

約数ペア:

[(1, 80215940), (2, 40107970), (4, 20053985), (5, 16043188), (7, 11459420), (10, 8021594), (14, 5729710), (20, 4010797), (28, 2864855), (35, 2291884), (49, 1637060), (70, 1145942), (98, 818530), (140, 572971), (196, 409265), (245, 327412), (490, 163706), (980, 81853)]