21654585

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 41842944

約数和(自身を除く): 20188359

約数列:

[1, 3, 5, 9, 15, 19, 31, 43, 45, 57, 93, 95, 129, 155, 171, 215, 279, 285, 361, 387, 465, 589, 645, 817, 855, 1083, 1333, 1395, 1767, 1805, 1935, 2451, 2945, 3249, 3999, 4085, 5301, 5415, 6665, 7353, 8835, 11191, 11997, 12255, 15523, 16245, 19995, 25327, 26505, 33573, 36765, 46569, 55955, 59985, 75981, 77615, 100719, 126635, 139707, 167865, 227943, 232845, 379905, 481213, 503595, 698535, 1139715, 1443639, 2406065, 4330917, 7218195, 21654585]

約数ペア:

[(1, 21654585), (3, 7218195), (5, 4330917), (9, 2406065), (15, 1443639), (19, 1139715), (31, 698535), (43, 503595), (45, 481213), (57, 379905), (93, 232845), (95, 227943), (129, 167865), (155, 139707), (171, 126635), (215, 100719), (279, 77615), (285, 75981), (361, 59985), (387, 55955), (465, 46569), (589, 36765), (645, 33573), (817, 26505), (855, 25327), (1083, 19995), (1333, 16245), (1395, 15523), (1767, 12255), (1805, 11997), (1935, 11191), (2451, 8835), (2945, 7353), (3249, 6665), (3999, 5415), (4085, 5301)]