21904636

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 22548164

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 71, 142, 221, 284, 349, 442, 698, 884, 923, 1207, 1396, 1846, 2414, 3692, 4537, 4828, 5933, 9074, 11866, 15691, 18148, 23732, 24779, 31382, 49558, 62764, 77129, 99116, 154258, 308516, 322127, 421243, 644254, 842486, 1288508, 1684972, 5476159, 10952318, 21904636]

約数ペア:

[(1, 21904636), (2, 10952318), (4, 5476159), (13, 1684972), (17, 1288508), (26, 842486), (34, 644254), (52, 421243), (68, 322127), (71, 308516), (142, 154258), (221, 99116), (284, 77129), (349, 62764), (442, 49558), (698, 31382), (884, 24779), (923, 23732), (1207, 18148), (1396, 15691), (1846, 11866), (2414, 9074), (3692, 5933), (4537, 4828)]