21718580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{811}}^1$

素因数の和:936

約数の個数: 48

約数和(自身を含む): 49655424

約数和(自身を除く): 27936844

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 103, 130, 206, 260, 412, 515, 811, 1030, 1339, 1622, 2060, 2678, 3244, 4055, 5356, 6695, 8110, 10543, 13390, 16220, 21086, 26780, 42172, 52715, 83533, 105430, 167066, 210860, 334132, 417665, 835330, 1085929, 1670660, 2171858, 4343716, 5429645, 10859290, 21718580]

約数ペア:

[(1, 21718580), (2, 10859290), (4, 5429645), (5, 4343716), (10, 2171858), (13, 1670660), (20, 1085929), (26, 835330), (52, 417665), (65, 334132), (103, 210860), (130, 167066), (206, 105430), (260, 83533), (412, 52715), (515, 42172), (811, 26780), (1030, 21086), (1339, 16220), (1622, 13390), (2060, 10543), (2678, 8110), (3244, 6695), (4055, 5356)]