81494920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2957}}^1$

素因数の和:3034

約数の個数: 64

約数和(自身を含む): 201262320

約数和(自身を除く): 119767400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 1060, 1378, 2120, 2756, 2957, 3445, 5512, 5914, 6890, 11828, 13780, 14785, 23656, 27560, 29570, 38441, 59140, 76882, 118280, 153764, 156721, 192205, 307528, 313442, 384410, 626884, 768820, 783605, 1253768, 1537640, 1567210, 2037373, 3134420, 4074746, 6268840, 8149492, 10186865, 16298984, 20373730, 40747460, 81494920]

約数ペア:

[(1, 81494920), (2, 40747460), (4, 20373730), (5, 16298984), (8, 10186865), (10, 8149492), (13, 6268840), (20, 4074746), (26, 3134420), (40, 2037373), (52, 1567210), (53, 1537640), (65, 1253768), (104, 783605), (106, 768820), (130, 626884), (212, 384410), (260, 313442), (265, 307528), (424, 192205), (520, 156721), (530, 153764), (689, 118280), (1060, 76882), (1378, 59140), (2120, 38441), (2756, 29570), (2957, 27560), (3445, 23656), (5512, 14785), (5914, 13780), (6890, 11828)]