21997305

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{14813}}^1$

素因数の和:14838

約数の個数: 32

約数和(自身を含む): 42664320

約数和(自身を除く): 20667015

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 135, 165, 297, 495, 1485, 14813, 44439, 74065, 133317, 162943, 222195, 399951, 488829, 666585, 814715, 1466487, 1999755, 2444145, 4399461, 7332435, 21997305]

約数ペア:

[(1, 21997305), (3, 7332435), (5, 4399461), (9, 2444145), (11, 1999755), (15, 1466487), (27, 814715), (33, 666585), (45, 488829), (55, 399951), (99, 222195), (135, 162943), (165, 133317), (297, 74065), (495, 44439), (1485, 14813)]