21489195

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{173}}^1$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 43559856

約数和(自身を除く): 22070661

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 169, 173, 195, 245, 273, 455, 507, 519, 637, 735, 845, 865, 1183, 1211, 1365, 1911, 2249, 2535, 2595, 3185, 3549, 3633, 5915, 6055, 6747, 8281, 8477, 9555, 11245, 15743, 17745, 18165, 24843, 25431, 29237, 33735, 41405, 42385, 47229, 78715, 87711, 110201, 124215, 127155, 146185, 204659, 236145, 330603, 438555, 551005, 613977, 1023295, 1432613, 1653015, 3069885, 4297839, 7163065, 21489195]

約数ペア:

[(1, 21489195), (3, 7163065), (5, 4297839), (7, 3069885), (13, 1653015), (15, 1432613), (21, 1023295), (35, 613977), (39, 551005), (49, 438555), (65, 330603), (91, 236145), (105, 204659), (147, 146185), (169, 127155), (173, 124215), (195, 110201), (245, 87711), (273, 78715), (455, 47229), (507, 42385), (519, 41405), (637, 33735), (735, 29237), (845, 25431), (865, 24843), (1183, 18165), (1211, 17745), (1365, 15743), (1911, 11245), (2249, 9555), (2535, 8477), (2595, 8281), (3185, 6747), (3549, 6055), (3633, 5915)]