21605895

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{463}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 40390272

約数和(自身を除く): 18784377

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 61, 85, 153, 183, 255, 305, 463, 549, 765, 915, 1037, 1389, 2315, 2745, 3111, 4167, 5185, 6945, 7871, 9333, 15555, 20835, 23613, 28243, 39355, 46665, 70839, 84729, 118065, 141215, 254187, 354195, 423645, 480131, 1270935, 1440393, 2400655, 4321179, 7201965, 21605895]

約数ペア:

[(1, 21605895), (3, 7201965), (5, 4321179), (9, 2400655), (15, 1440393), (17, 1270935), (45, 480131), (51, 423645), (61, 354195), (85, 254187), (153, 141215), (183, 118065), (255, 84729), (305, 70839), (463, 46665), (549, 39355), (765, 28243), (915, 23613), (1037, 20835), (1389, 15555), (2315, 9333), (2745, 7871), (3111, 6945), (4167, 5185)]