21521520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:511

約数の個数: 120

約数和(自身を含む): 73468512

約数和(自身を除く): 51946992

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 71, 72, 80, 90, 120, 142, 144, 180, 213, 240, 284, 355, 360, 421, 426, 568, 639, 710, 720, 842, 852, 1065, 1136, 1263, 1278, 1420, 1684, 1704, 2105, 2130, 2526, 2556, 2840, 3195, 3368, 3408, 3789, 4210, 4260, 5052, 5112, 5680, 6315, 6390, 6736, 7578, 8420, 8520, 10104, 10224, 12630, 12780, 15156, 16840, 17040, 18945, 20208, 25260, 25560, 29891, 30312, 33680, 37890, 50520, 51120, 59782, 60624, 75780, 89673, 101040, 119564, 149455, 151560, 179346, 239128, 269019, 298910, 303120, 358692, 448365, 478256, 538038, 597820, 717384, 896730, 1076076, 1195640, 1345095, 1434768, 1793460, 2152152, 2391280, 2690190, 3586920, 4304304, 5380380, 7173840, 10760760, 21521520]

約数ペア:

[(1, 21521520), (2, 10760760), (3, 7173840), (4, 5380380), (5, 4304304), (6, 3586920), (8, 2690190), (9, 2391280), (10, 2152152), (12, 1793460), (15, 1434768), (16, 1345095), (18, 1195640), (20, 1076076), (24, 896730), (30, 717384), (36, 597820), (40, 538038), (45, 478256), (48, 448365), (60, 358692), (71, 303120), (72, 298910), (80, 269019), (90, 239128), (120, 179346), (142, 151560), (144, 149455), (180, 119564), (213, 101040), (240, 89673), (284, 75780), (355, 60624), (360, 59782), (421, 51120), (426, 50520), (568, 37890), (639, 33680), (710, 30312), (720, 29891), (842, 25560), (852, 25260), (1065, 20208), (1136, 18945), (1263, 17040), (1278, 16840), (1420, 15156), (1684, 12780), (1704, 12630), (2105, 10224), (2130, 10104), (2526, 8520), (2556, 8420), (2840, 7578), (3195, 6736), (3368, 6390), (3408, 6315), (3789, 5680), (4210, 5112), (4260, 5052)]