21306090

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54631}}^1$

素因数の和:54654

約数の個数: 32

約数和(自身を含む): 55069056

約数和(自身を除く): 33762966

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54631, 109262, 163893, 273155, 327786, 546310, 710203, 819465, 1420406, 1638930, 2130609, 3551015, 4261218, 7102030, 10653045, 21306090]

約数ペア:

[(1, 21306090), (2, 10653045), (3, 7102030), (5, 4261218), (6, 3551015), (10, 2130609), (13, 1638930), (15, 1420406), (26, 819465), (30, 710203), (39, 546310), (65, 327786), (78, 273155), (130, 163893), (195, 109262), (390, 54631)]