21273018

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:359

約数の個数: 64

約数和(自身を含む): 49496832

約数和(自身を除く): 28223814

約数列:

[1, 2, 3, 6, 13, 17, 26, 34, 39, 51, 61, 78, 102, 122, 183, 221, 263, 366, 442, 526, 663, 789, 793, 1037, 1326, 1578, 1586, 2074, 2379, 3111, 3419, 4471, 4758, 6222, 6838, 8942, 10257, 13413, 13481, 16043, 20514, 26826, 26962, 32086, 40443, 48129, 58123, 80886, 96258, 116246, 174369, 208559, 272731, 348738, 417118, 545462, 625677, 818193, 1251354, 1636386, 3545503, 7091006, 10636509, 21273018]

約数ペア:

[(1, 21273018), (2, 10636509), (3, 7091006), (6, 3545503), (13, 1636386), (17, 1251354), (26, 818193), (34, 625677), (39, 545462), (51, 417118), (61, 348738), (78, 272731), (102, 208559), (122, 174369), (183, 116246), (221, 96258), (263, 80886), (366, 58123), (442, 48129), (526, 40443), (663, 32086), (789, 26962), (793, 26826), (1037, 20514), (1326, 16043), (1578, 13481), (1586, 13413), (2074, 10257), (2379, 8942), (3111, 6838), (3419, 6222), (4471, 4758)]