21900420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{421}}^1$

素因数の和:470

約数の個数: 108

約数和(自身を含む): 70736484

約数和(自身を除く): 48836064

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 289, 306, 340, 421, 510, 578, 612, 765, 842, 867, 1020, 1156, 1263, 1445, 1530, 1684, 1734, 2105, 2526, 2601, 2890, 3060, 3468, 3789, 4210, 4335, 5052, 5202, 5780, 6315, 7157, 7578, 8420, 8670, 10404, 12630, 13005, 14314, 15156, 17340, 18945, 21471, 25260, 26010, 28628, 35785, 37890, 42942, 52020, 64413, 71570, 75780, 85884, 107355, 121669, 128826, 143140, 214710, 243338, 257652, 322065, 365007, 429420, 486676, 608345, 644130, 730014, 1095021, 1216690, 1288260, 1460028, 1825035, 2190042, 2433380, 3650070, 4380084, 5475105, 7300140, 10950210, 21900420]

約数ペア:

[(1, 21900420), (2, 10950210), (3, 7300140), (4, 5475105), (5, 4380084), (6, 3650070), (9, 2433380), (10, 2190042), (12, 1825035), (15, 1460028), (17, 1288260), (18, 1216690), (20, 1095021), (30, 730014), (34, 644130), (36, 608345), (45, 486676), (51, 429420), (60, 365007), (68, 322065), (85, 257652), (90, 243338), (102, 214710), (153, 143140), (170, 128826), (180, 121669), (204, 107355), (255, 85884), (289, 75780), (306, 71570), (340, 64413), (421, 52020), (510, 42942), (578, 37890), (612, 35785), (765, 28628), (842, 26010), (867, 25260), (1020, 21471), (1156, 18945), (1263, 17340), (1445, 15156), (1530, 14314), (1684, 13005), (1734, 12630), (2105, 10404), (2526, 8670), (2601, 8420), (2890, 7578), (3060, 7157), (3468, 6315), (3789, 5780), (4210, 5202), (4335, 5052)]