20294640

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:487

約数の個数: 120

約数和(自身を含む): 69290208

約数和(自身を除く): 48995568

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, 397, 426, 568, 639, 710, 720, 794, 852, 1065, 1136, 1191, 1278, 1420, 1588, 1704, 1985, 2130, 2382, 2556, 2840, 3176, 3195, 3408, 3573, 3970, 4260, 4764, 5112, 5680, 5955, 6352, 6390, 7146, 7940, 8520, 9528, 10224, 11910, 12780, 14292, 15880, 17040, 17865, 19056, 23820, 25560, 28187, 28584, 31760, 35730, 47640, 51120, 56374, 57168, 71460, 84561, 95280, 112748, 140935, 142920, 169122, 225496, 253683, 281870, 285840, 338244, 422805, 450992, 507366, 563740, 676488, 845610, 1014732, 1127480, 1268415, 1352976, 1691220, 2029464, 2254960, 2536830, 3382440, 4058928, 5073660, 6764880, 10147320, 20294640]

約数ペア:

[(1, 20294640), (2, 10147320), (3, 6764880), (4, 5073660), (5, 4058928), (6, 3382440), (8, 2536830), (9, 2254960), (10, 2029464), (12, 1691220), (15, 1352976), (16, 1268415), (18, 1127480), (20, 1014732), (24, 845610), (30, 676488), (36, 563740), (40, 507366), (45, 450992), (48, 422805), (60, 338244), (71, 285840), (72, 281870), (80, 253683), (90, 225496), (120, 169122), (142, 142920), (144, 140935), (180, 112748), (213, 95280), (240, 84561), (284, 71460), (355, 57168), (360, 56374), (397, 51120), (426, 47640), (568, 35730), (639, 31760), (710, 28584), (720, 28187), (794, 25560), (852, 23820), (1065, 19056), (1136, 17865), (1191, 17040), (1278, 15880), (1420, 14292), (1588, 12780), (1704, 11910), (1985, 10224), (2130, 9528), (2382, 8520), (2556, 7940), (2840, 7146), (3176, 6390), (3195, 6352), (3408, 5955), (3573, 5680), (3970, 5112), (4260, 4764)]