81991384

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 167932800

約数和(自身を除く): 85941416

約数列:

[1, 2, 4, 8, 19, 38, 67, 76, 83, 97, 134, 152, 166, 194, 268, 332, 388, 536, 664, 776, 1273, 1577, 1843, 2546, 3154, 3686, 5092, 5561, 6308, 6499, 7372, 8051, 10184, 11122, 12616, 12998, 14744, 16102, 22244, 25996, 32204, 44488, 51992, 64408, 105659, 123481, 152969, 211318, 246962, 305938, 422636, 493924, 539417, 611876, 845272, 987848, 1078834, 1223752, 2157668, 4315336, 10248923, 20497846, 40995692, 81991384]

約数ペア:

[(1, 81991384), (2, 40995692), (4, 20497846), (8, 10248923), (19, 4315336), (38, 2157668), (67, 1223752), (76, 1078834), (83, 987848), (97, 845272), (134, 611876), (152, 539417), (166, 493924), (194, 422636), (268, 305938), (332, 246962), (388, 211318), (536, 152969), (664, 123481), (776, 105659), (1273, 64408), (1577, 51992), (1843, 44488), (2546, 32204), (3154, 25996), (3686, 22244), (5092, 16102), (5561, 14744), (6308, 12998), (6499, 12616), (7372, 11122), (8051, 10184)]