21478260

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{8731}}^1$

素因数の和:8784

約数の個数: 48

約数和(自身を含む): 61612992

約数和(自身を除く): 40134732

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 41, 60, 82, 123, 164, 205, 246, 410, 492, 615, 820, 1230, 2460, 8731, 17462, 26193, 34924, 43655, 52386, 87310, 104772, 130965, 174620, 261930, 357971, 523860, 715942, 1073913, 1431884, 1789855, 2147826, 3579710, 4295652, 5369565, 7159420, 10739130, 21478260]

約数ペア:

[(1, 21478260), (2, 10739130), (3, 7159420), (4, 5369565), (5, 4295652), (6, 3579710), (10, 2147826), (12, 1789855), (15, 1431884), (20, 1073913), (30, 715942), (41, 523860), (60, 357971), (82, 261930), (123, 174620), (164, 130965), (205, 104772), (246, 87310), (410, 52386), (492, 43655), (615, 34924), (820, 26193), (1230, 17462), (2460, 8731)]