18721980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{2213}}^1$

素因数の和:2275

約数の個数: 72

約数和(自身を含む): 58024512

約数和(自身を除く): 39302532

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 47, 60, 90, 94, 141, 180, 188, 235, 282, 423, 470, 564, 705, 846, 940, 1410, 1692, 2115, 2213, 2820, 4230, 4426, 6639, 8460, 8852, 11065, 13278, 19917, 22130, 26556, 33195, 39834, 44260, 66390, 79668, 99585, 104011, 132780, 199170, 208022, 312033, 398340, 416044, 520055, 624066, 936099, 1040110, 1248132, 1560165, 1872198, 2080220, 3120330, 3744396, 4680495, 6240660, 9360990, 18721980]

約数ペア:

[(1, 18721980), (2, 9360990), (3, 6240660), (4, 4680495), (5, 3744396), (6, 3120330), (9, 2080220), (10, 1872198), (12, 1560165), (15, 1248132), (18, 1040110), (20, 936099), (30, 624066), (36, 520055), (45, 416044), (47, 398340), (60, 312033), (90, 208022), (94, 199170), (141, 132780), (180, 104011), (188, 99585), (235, 79668), (282, 66390), (423, 44260), (470, 39834), (564, 33195), (705, 26556), (846, 22130), (940, 19917), (1410, 13278), (1692, 11065), (2115, 8852), (2213, 8460), (2820, 6639), (4230, 4426)]