72440420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{278617}}^1$

素因数の和:278639

約数の個数: 24

約数和(自身を含む): 163827384

約数和(自身を除く): 91386964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 278617, 557234, 1114468, 1393085, 2786170, 3622021, 5572340, 7244042, 14488084, 18110105, 36220210, 72440420]

約数ペア:

[(1, 72440420), (2, 36220210), (4, 18110105), (5, 14488084), (10, 7244042), (13, 5572340), (20, 3622021), (26, 2786170), (52, 1393085), (65, 1114468), (130, 557234), (260, 278617)]