21420480

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{421}}^1$

素因数の和:494

約数の個数: 112

約数和(自身を含む): 69457824

約数和(自身を除く): 48037344

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 53, 60, 64, 80, 96, 106, 120, 159, 160, 192, 212, 240, 265, 318, 320, 421, 424, 480, 530, 636, 795, 842, 848, 960, 1060, 1263, 1272, 1590, 1684, 1696, 2105, 2120, 2526, 2544, 3180, 3368, 3392, 4210, 4240, 5052, 5088, 6315, 6360, 6736, 8420, 8480, 10104, 10176, 12630, 12720, 13472, 16840, 16960, 20208, 22313, 25260, 25440, 26944, 33680, 40416, 44626, 50520, 50880, 66939, 67360, 80832, 89252, 101040, 111565, 133878, 134720, 178504, 202080, 223130, 267756, 334695, 357008, 404160, 446260, 535512, 669390, 714016, 892520, 1071024, 1338780, 1428032, 1785040, 2142048, 2677560, 3570080, 4284096, 5355120, 7140160, 10710240, 21420480]

約数ペア:

[(1, 21420480), (2, 10710240), (3, 7140160), (4, 5355120), (5, 4284096), (6, 3570080), (8, 2677560), (10, 2142048), (12, 1785040), (15, 1428032), (16, 1338780), (20, 1071024), (24, 892520), (30, 714016), (32, 669390), (40, 535512), (48, 446260), (53, 404160), (60, 357008), (64, 334695), (80, 267756), (96, 223130), (106, 202080), (120, 178504), (159, 134720), (160, 133878), (192, 111565), (212, 101040), (240, 89252), (265, 80832), (318, 67360), (320, 66939), (421, 50880), (424, 50520), (480, 44626), (530, 40416), (636, 33680), (795, 26944), (842, 25440), (848, 25260), (960, 22313), (1060, 20208), (1263, 16960), (1272, 16840), (1590, 13472), (1684, 12720), (1696, 12630), (2105, 10176), (2120, 10104), (2526, 8480), (2544, 8420), (3180, 6736), (3368, 6360), (3392, 6315), (4210, 5088), (4240, 5052)]