20918715

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{2531}}^1$

素因数の和:2587

約数の個数: 32

約数和(自身を含む): 36460800

約数和(自身を除く): 15542085

約数列:

[1, 3, 5, 15, 19, 29, 57, 87, 95, 145, 285, 435, 551, 1653, 2531, 2755, 7593, 8265, 12655, 37965, 48089, 73399, 144267, 220197, 240445, 366995, 721335, 1100985, 1394581, 4183743, 6972905, 20918715]

約数ペア:

[(1, 20918715), (3, 6972905), (5, 4183743), (15, 1394581), (19, 1100985), (29, 721335), (57, 366995), (87, 240445), (95, 220197), (145, 144267), (285, 73399), (435, 48089), (551, 37965), (1653, 12655), (2531, 8265), (2755, 7593)]