19811240

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{947}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 44707680

約数和(自身を除く): 24896440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 947, 1046, 1894, 2092, 2615, 3788, 4184, 4735, 5230, 7576, 9470, 10460, 18940, 20920, 37880, 495281, 990562, 1981124, 2476405, 3962248, 4952810, 9905620, 19811240]

約数ペア:

[(1, 19811240), (2, 9905620), (4, 4952810), (5, 3962248), (8, 2476405), (10, 1981124), (20, 990562), (40, 495281), (523, 37880), (947, 20920), (1046, 18940), (1894, 10460), (2092, 9470), (2615, 7576), (3788, 5230), (4184, 4735)]