21397470

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{37}}^2\times {\mathrm{521}}^1$

素因数の和:605

約数の個数: 48

約数和(自身を含む): 52880688

約数和(自身を除く): 31483218

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 37, 74, 111, 185, 222, 370, 521, 555, 1042, 1110, 1369, 1563, 2605, 2738, 3126, 4107, 5210, 6845, 7815, 8214, 13690, 15630, 19277, 20535, 38554, 41070, 57831, 96385, 115662, 192770, 289155, 578310, 713249, 1426498, 2139747, 3566245, 4279494, 7132490, 10698735, 21397470]

約数ペア:

[(1, 21397470), (2, 10698735), (3, 7132490), (5, 4279494), (6, 3566245), (10, 2139747), (15, 1426498), (30, 713249), (37, 578310), (74, 289155), (111, 192770), (185, 115662), (222, 96385), (370, 57831), (521, 41070), (555, 38554), (1042, 20535), (1110, 19277), (1369, 15630), (1563, 13690), (2605, 8214), (2738, 7815), (3126, 6845), (4107, 5210)]