19724375

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1$

素因数の和:201

約数の個数: 40

約数和(自身を含む): 28490880

約数和(自身を除く): 8766505

約数列:

[1, 5, 11, 19, 25, 55, 95, 125, 151, 209, 275, 475, 625, 755, 1045, 1375, 1661, 2375, 2869, 3775, 5225, 6875, 8305, 11875, 14345, 18875, 26125, 31559, 41525, 71725, 94375, 130625, 157795, 207625, 358625, 788975, 1038125, 1793125, 3944875, 19724375]

約数ペア:

[(1, 19724375), (5, 3944875), (11, 1793125), (19, 1038125), (25, 788975), (55, 358625), (95, 207625), (125, 157795), (151, 130625), (209, 94375), (275, 71725), (475, 41525), (625, 31559), (755, 26125), (1045, 18875), (1375, 14345), (1661, 11875), (2375, 8305), (2869, 6875), (3775, 5225)]