21980660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4973}}^1$

素因数の和:5012

約数の個数: 48

約数和(自身を含む): 52644816

約数和(自身を除く): 30664156

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4973, 9946, 19892, 24865, 49730, 64649, 84541, 99460, 129298, 169082, 258596, 323245, 338164, 422705, 646490, 845410, 1099033, 1292980, 1690820, 2198066, 4396132, 5495165, 10990330, 21980660]

約数ペア:

[(1, 21980660), (2, 10990330), (4, 5495165), (5, 4396132), (10, 2198066), (13, 1690820), (17, 1292980), (20, 1099033), (26, 845410), (34, 646490), (52, 422705), (65, 338164), (68, 323245), (85, 258596), (130, 169082), (170, 129298), (221, 99460), (260, 84541), (340, 64649), (442, 49730), (884, 24865), (1105, 19892), (2210, 9946), (4420, 4973)]