20864775

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 36560160

約数和(自身を除く): 15695385

約数列:

[1, 3, 5, 15, 25, 29, 53, 75, 87, 145, 159, 181, 265, 435, 543, 725, 795, 905, 1325, 1537, 2175, 2715, 3975, 4525, 4611, 5249, 7685, 9593, 13575, 15747, 23055, 26245, 28779, 38425, 47965, 78735, 115275, 131225, 143895, 239825, 278197, 393675, 719475, 834591, 1390985, 4172955, 6954925, 20864775]

約数ペア:

[(1, 20864775), (3, 6954925), (5, 4172955), (15, 1390985), (25, 834591), (29, 719475), (53, 393675), (75, 278197), (87, 239825), (145, 143895), (159, 131225), (181, 115275), (265, 78735), (435, 47965), (543, 38425), (725, 28779), (795, 26245), (905, 23055), (1325, 15747), (1537, 13575), (2175, 9593), (2715, 7685), (3975, 5249), (4525, 4611)]