18000920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1213}}^1$

素因数の和:1284

約数の個数: 64

約数和(自身を含む): 47200320

約数和(自身を除く): 29199400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1213, 1484, 1855, 2120, 2426, 2968, 3710, 4852, 6065, 7420, 8491, 9704, 12130, 14840, 16982, 24260, 33964, 42455, 48520, 64289, 67928, 84910, 128578, 169820, 257156, 321445, 339640, 450023, 514312, 642890, 900046, 1285780, 1800092, 2250115, 2571560, 3600184, 4500230, 9000460, 18000920]

約数ペア:

[(1, 18000920), (2, 9000460), (4, 4500230), (5, 3600184), (7, 2571560), (8, 2250115), (10, 1800092), (14, 1285780), (20, 900046), (28, 642890), (35, 514312), (40, 450023), (53, 339640), (56, 321445), (70, 257156), (106, 169820), (140, 128578), (212, 84910), (265, 67928), (280, 64289), (371, 48520), (424, 42455), (530, 33964), (742, 24260), (1060, 16982), (1213, 14840), (1484, 12130), (1855, 9704), (2120, 8491), (2426, 7420), (2968, 6065), (3710, 4852)]