21600405

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^2$

素因数の和:179

約数の個数: 48

約数和(自身を含む): 39948480

約数和(自身を除く): 18348075

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 61, 129, 135, 183, 215, 305, 387, 549, 645, 915, 1161, 1647, 1935, 2623, 2745, 3721, 5805, 7869, 8235, 11163, 13115, 18605, 23607, 33489, 39345, 55815, 70821, 100467, 118035, 160003, 167445, 354105, 480009, 502335, 800015, 1440027, 2400045, 4320081, 7200135, 21600405]

約数ペア:

[(1, 21600405), (3, 7200135), (5, 4320081), (9, 2400045), (15, 1440027), (27, 800015), (43, 502335), (45, 480009), (61, 354105), (129, 167445), (135, 160003), (183, 118035), (215, 100467), (305, 70821), (387, 55815), (549, 39345), (645, 33489), (915, 23607), (1161, 18605), (1647, 13115), (1935, 11163), (2623, 8235), (2745, 7869), (3721, 5805)]