81788540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:243

約数の個数: 96

約数和(自身を含む): 191600640

約数和(自身を除く): 109812100

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 53, 62, 76, 95, 106, 124, 131, 155, 190, 212, 262, 265, 310, 380, 524, 530, 589, 620, 655, 1007, 1060, 1178, 1310, 1643, 2014, 2356, 2489, 2620, 2945, 3286, 4028, 4061, 4978, 5035, 5890, 6572, 6943, 8122, 8215, 9956, 10070, 11780, 12445, 13886, 16244, 16430, 20140, 20305, 24890, 27772, 31217, 32860, 34715, 40610, 49780, 62434, 69430, 77159, 81220, 124868, 131917, 138860, 154318, 156085, 215233, 263834, 308636, 312170, 385795, 430466, 527668, 624340, 659585, 771590, 860932, 1076165, 1319170, 1543180, 2152330, 2638340, 4089427, 4304660, 8178854, 16357708, 20447135, 40894270, 81788540]

約数ペア:

[(1, 81788540), (2, 40894270), (4, 20447135), (5, 16357708), (10, 8178854), (19, 4304660), (20, 4089427), (31, 2638340), (38, 2152330), (53, 1543180), (62, 1319170), (76, 1076165), (95, 860932), (106, 771590), (124, 659585), (131, 624340), (155, 527668), (190, 430466), (212, 385795), (262, 312170), (265, 308636), (310, 263834), (380, 215233), (524, 156085), (530, 154318), (589, 138860), (620, 131917), (655, 124868), (1007, 81220), (1060, 77159), (1178, 69430), (1310, 62434), (1643, 49780), (2014, 40610), (2356, 34715), (2489, 32860), (2620, 31217), (2945, 27772), (3286, 24890), (4028, 20305), (4061, 20140), (4978, 16430), (5035, 16244), (5890, 13886), (6572, 12445), (6943, 11780), (8122, 10070), (8215, 9956)]