21994380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1721}}^1$

素因数の和:1807

約数の個数: 72

約数和(自身を含む): 67695264

約数和(自身を除く): 45700884

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1721, 2130, 2556, 3195, 3442, 4260, 5163, 6390, 6884, 8605, 10326, 12780, 15489, 17210, 20652, 25815, 30978, 34420, 51630, 61956, 77445, 103260, 122191, 154890, 244382, 309780, 366573, 488764, 610955, 733146, 1099719, 1221910, 1466292, 1832865, 2199438, 2443820, 3665730, 4398876, 5498595, 7331460, 10997190, 21994380]

約数ペア:

[(1, 21994380), (2, 10997190), (3, 7331460), (4, 5498595), (5, 4398876), (6, 3665730), (9, 2443820), (10, 2199438), (12, 1832865), (15, 1466292), (18, 1221910), (20, 1099719), (30, 733146), (36, 610955), (45, 488764), (60, 366573), (71, 309780), (90, 244382), (142, 154890), (180, 122191), (213, 103260), (284, 77445), (355, 61956), (426, 51630), (639, 34420), (710, 30978), (852, 25815), (1065, 20652), (1278, 17210), (1420, 15489), (1721, 12780), (2130, 10326), (2556, 8605), (3195, 6884), (3442, 6390), (4260, 5163)]