21215940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{3433}}^1$

素因数の和:3548

約数の個数: 48

約数和(自身を含む): 59998848

約数和(自身を除く): 38782908

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 103, 206, 309, 412, 515, 618, 1030, 1236, 1545, 2060, 3090, 3433, 6180, 6866, 10299, 13732, 17165, 20598, 34330, 41196, 51495, 68660, 102990, 205980, 353599, 707198, 1060797, 1414396, 1767995, 2121594, 3535990, 4243188, 5303985, 7071980, 10607970, 21215940]

約数ペア:

[(1, 21215940), (2, 10607970), (3, 7071980), (4, 5303985), (5, 4243188), (6, 3535990), (10, 2121594), (12, 1767995), (15, 1414396), (20, 1060797), (30, 707198), (60, 353599), (103, 205980), (206, 102990), (309, 68660), (412, 51495), (515, 41196), (618, 34330), (1030, 20598), (1236, 17165), (1545, 13732), (2060, 10299), (3090, 6866), (3433, 6180)]