81914820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{105019}}^1$

素因数の和:105044

約数の個数: 48

約数和(自身を含む): 247007040

約数和(自身を除く): 165092220

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 105019, 210038, 315057, 420076, 525095, 630114, 1050190, 1260228, 1365247, 1575285, 2100380, 2730494, 3150570, 4095741, 5460988, 6301140, 6826235, 8191482, 13652470, 16382964, 20478705, 27304940, 40957410, 81914820]

約数ペア:

[(1, 81914820), (2, 40957410), (3, 27304940), (4, 20478705), (5, 16382964), (6, 13652470), (10, 8191482), (12, 6826235), (13, 6301140), (15, 5460988), (20, 4095741), (26, 3150570), (30, 2730494), (39, 2100380), (52, 1575285), (60, 1365247), (65, 1260228), (78, 1050190), (130, 630114), (156, 525095), (195, 420076), (260, 315057), (390, 210038), (780, 105019)]