64512500

素因数分解:

$2^2\times 5^5\times {\mathrm{13}}^1\times {\mathrm{397}}^1$

素因数の和:439

約数の個数: 72

約数和(自身を含む): 152349624

約数和(自身を除く): 87837124

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 397, 500, 625, 650, 794, 1250, 1300, 1588, 1625, 1985, 2500, 3125, 3250, 3970, 5161, 6250, 6500, 7940, 8125, 9925, 10322, 12500, 16250, 19850, 20644, 25805, 32500, 39700, 40625, 49625, 51610, 81250, 99250, 103220, 129025, 162500, 198500, 248125, 258050, 496250, 516100, 645125, 992500, 1240625, 1290250, 2481250, 2580500, 3225625, 4962500, 6451250, 12902500, 16128125, 32256250, 64512500]

約数ペア:

[(1, 64512500), (2, 32256250), (4, 16128125), (5, 12902500), (10, 6451250), (13, 4962500), (20, 3225625), (25, 2580500), (26, 2481250), (50, 1290250), (52, 1240625), (65, 992500), (100, 645125), (125, 516100), (130, 496250), (250, 258050), (260, 248125), (325, 198500), (397, 162500), (500, 129025), (625, 103220), (650, 99250), (794, 81250), (1250, 51610), (1300, 49625), (1588, 40625), (1625, 39700), (1985, 32500), (2500, 25805), (3125, 20644), (3250, 19850), (3970, 16250), (5161, 12500), (6250, 10322), (6500, 9925), (7940, 8125)]