21018403

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:283

約数の個数: 24

約数和(自身を含む): 25674624

約数和(自身を除く): 4656221

約数列:

[1, 7, 31, 49, 101, 137, 217, 707, 959, 1519, 3131, 4247, 4949, 6713, 13837, 21917, 29729, 96859, 153419, 208103, 428947, 678013, 3002629, 21018403]

約数ペア:

[(1, 21018403), (7, 3002629), (31, 678013), (49, 428947), (101, 208103), (137, 153419), (217, 96859), (707, 29729), (959, 21917), (1519, 13837), (3131, 6713), (4247, 4949)]