81947475

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{661}}^1$

素因数の和:725

約数の個数: 72

約数和(自身を含む): 160071600

約数和(自身を除く): 78124125

約数列:

[1, 3, 5, 9, 15, 19, 25, 29, 45, 57, 75, 87, 95, 145, 171, 225, 261, 285, 435, 475, 551, 661, 725, 855, 1305, 1425, 1653, 1983, 2175, 2755, 3305, 4275, 4959, 5949, 6525, 8265, 9915, 12559, 13775, 16525, 19169, 24795, 29745, 37677, 41325, 49575, 57507, 62795, 95845, 113031, 123975, 148725, 172521, 188385, 287535, 313975, 364211, 479225, 565155, 862605, 941925, 1092633, 1437675, 1821055, 2825775, 3277899, 4313025, 5463165, 9105275, 16389495, 27315825, 81947475]

約数ペア:

[(1, 81947475), (3, 27315825), (5, 16389495), (9, 9105275), (15, 5463165), (19, 4313025), (25, 3277899), (29, 2825775), (45, 1821055), (57, 1437675), (75, 1092633), (87, 941925), (95, 862605), (145, 565155), (171, 479225), (225, 364211), (261, 313975), (285, 287535), (435, 188385), (475, 172521), (551, 148725), (661, 123975), (725, 113031), (855, 95845), (1305, 62795), (1425, 57507), (1653, 49575), (1983, 41325), (2175, 37677), (2755, 29745), (3305, 24795), (4275, 19169), (4959, 16525), (5949, 13775), (6525, 12559), (8265, 9915)]