21293220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27299}}^1$

素因数の和:27324

約数の個数: 48

約数和(自身を含む): 64209600

約数和(自身を除く): 42916380

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27299, 54598, 81897, 109196, 136495, 163794, 272990, 327588, 354887, 409485, 545980, 709774, 818970, 1064661, 1419548, 1637940, 1774435, 2129322, 3548870, 4258644, 5323305, 7097740, 10646610, 21293220]

約数ペア:

[(1, 21293220), (2, 10646610), (3, 7097740), (4, 5323305), (5, 4258644), (6, 3548870), (10, 2129322), (12, 1774435), (13, 1637940), (15, 1419548), (20, 1064661), (26, 818970), (30, 709774), (39, 545980), (52, 409485), (60, 354887), (65, 327588), (78, 272990), (130, 163794), (156, 136495), (195, 109196), (260, 81897), (390, 54598), (780, 27299)]