81353240

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{397}}^1$

素因数の和:564

約数の個数: 64

約数和(自身を含む): 189129600

約数和(自身を除く): 107776360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 109, 188, 218, 235, 376, 397, 436, 470, 545, 794, 872, 940, 1090, 1588, 1880, 1985, 2180, 3176, 3970, 4360, 5123, 7940, 10246, 15880, 18659, 20492, 25615, 37318, 40984, 43273, 51230, 74636, 86546, 93295, 102460, 149272, 173092, 186590, 204920, 216365, 346184, 373180, 432730, 746360, 865460, 1730920, 2033831, 4067662, 8135324, 10169155, 16270648, 20338310, 40676620, 81353240]

約数ペア:

[(1, 81353240), (2, 40676620), (4, 20338310), (5, 16270648), (8, 10169155), (10, 8135324), (20, 4067662), (40, 2033831), (47, 1730920), (94, 865460), (109, 746360), (188, 432730), (218, 373180), (235, 346184), (376, 216365), (397, 204920), (436, 186590), (470, 173092), (545, 149272), (794, 102460), (872, 93295), (940, 86546), (1090, 74636), (1588, 51230), (1880, 43273), (1985, 40984), (2180, 37318), (3176, 25615), (3970, 20492), (4360, 18659), (5123, 15880), (7940, 10246)]