81446940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6373}}^1$

素因数の和:6459

約数の個数: 72

約数和(自身を含む): 250574688

約数和(自身を除く): 169127748

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, 2130, 2556, 3195, 4260, 6373, 6390, 12746, 12780, 19119, 25492, 31865, 38238, 57357, 63730, 76476, 95595, 114714, 127460, 191190, 229428, 286785, 382380, 452483, 573570, 904966, 1147140, 1357449, 1809932, 2262415, 2714898, 4072347, 4524830, 5429796, 6787245, 8144694, 9049660, 13574490, 16289388, 20361735, 27148980, 40723470, 81446940]

約数ペア:

[(1, 81446940), (2, 40723470), (3, 27148980), (4, 20361735), (5, 16289388), (6, 13574490), (9, 9049660), (10, 8144694), (12, 6787245), (15, 5429796), (18, 4524830), (20, 4072347), (30, 2714898), (36, 2262415), (45, 1809932), (60, 1357449), (71, 1147140), (90, 904966), (142, 573570), (180, 452483), (213, 382380), (284, 286785), (355, 229428), (426, 191190), (639, 127460), (710, 114714), (852, 95595), (1065, 76476), (1278, 63730), (1420, 57357), (2130, 38238), (2556, 31865), (3195, 25492), (4260, 19119), (6373, 12780), (6390, 12746)]