21106280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1097}}^1$

素因数の和:1158

約数の個数: 64

約数和(自身を含む): 52572240

約数和(自身を除く): 31465960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 148, 185, 260, 296, 370, 481, 520, 740, 962, 1097, 1480, 1924, 2194, 2405, 3848, 4388, 4810, 5485, 8776, 9620, 10970, 14261, 19240, 21940, 28522, 40589, 43880, 57044, 71305, 81178, 114088, 142610, 162356, 202945, 285220, 324712, 405890, 527657, 570440, 811780, 1055314, 1623560, 2110628, 2638285, 4221256, 5276570, 10553140, 21106280]

約数ペア:

[(1, 21106280), (2, 10553140), (4, 5276570), (5, 4221256), (8, 2638285), (10, 2110628), (13, 1623560), (20, 1055314), (26, 811780), (37, 570440), (40, 527657), (52, 405890), (65, 324712), (74, 285220), (104, 202945), (130, 162356), (148, 142610), (185, 114088), (260, 81178), (296, 71305), (370, 57044), (481, 43880), (520, 40589), (740, 28522), (962, 21940), (1097, 19240), (1480, 14261), (1924, 10970), (2194, 9620), (2405, 8776), (3848, 5485), (4388, 4810)]