19940540

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{647}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 44416512

約数和(自身を除く): 24475972

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 67, 92, 115, 134, 230, 268, 335, 460, 647, 670, 1294, 1340, 1541, 2588, 3082, 3235, 6164, 6470, 7705, 12940, 14881, 15410, 29762, 30820, 43349, 59524, 74405, 86698, 148810, 173396, 216745, 297620, 433490, 866980, 997027, 1994054, 3988108, 4985135, 9970270, 19940540]

約数ペア:

[(1, 19940540), (2, 9970270), (4, 4985135), (5, 3988108), (10, 1994054), (20, 997027), (23, 866980), (46, 433490), (67, 297620), (92, 216745), (115, 173396), (134, 148810), (230, 86698), (268, 74405), (335, 59524), (460, 43349), (647, 30820), (670, 29762), (1294, 15410), (1340, 14881), (1541, 12940), (2588, 7705), (3082, 6470), (3235, 6164)]