20312240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19531}}^1$

素因数の和:19557

約数の個数: 40

約数和(自身を含む): 50861328

約数和(自身を除く): 30549088

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19531, 39062, 78124, 97655, 156248, 195310, 253903, 312496, 390620, 507806, 781240, 1015612, 1269515, 1562480, 2031224, 2539030, 4062448, 5078060, 10156120, 20312240]

約数ペア:

[(1, 20312240), (2, 10156120), (4, 5078060), (5, 4062448), (8, 2539030), (10, 2031224), (13, 1562480), (16, 1269515), (20, 1015612), (26, 781240), (40, 507806), (52, 390620), (65, 312496), (80, 253903), (104, 195310), (130, 156248), (208, 97655), (260, 78124), (520, 39062), (1040, 19531)]