81451760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{271}}^1$

素因数の和:331

約数の個数: 120

約数和(自身を含む): 217444416

約数和(自身を除く): 135992656

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 170, 208, 221, 260, 271, 272, 289, 340, 442, 520, 542, 578, 680, 884, 1040, 1084, 1105, 1156, 1355, 1360, 1445, 1768, 2168, 2210, 2312, 2710, 2890, 3523, 3536, 3757, 4336, 4420, 4607, 4624, 5420, 5780, 7046, 7514, 8840, 9214, 10840, 11560, 14092, 15028, 17615, 17680, 18428, 18785, 21680, 23035, 23120, 28184, 30056, 35230, 36856, 37570, 46070, 56368, 59891, 60112, 70460, 73712, 75140, 78319, 92140, 119782, 140920, 150280, 156638, 184280, 239564, 281840, 299455, 300560, 313276, 368560, 391595, 479128, 598910, 626552, 783190, 958256, 1018147, 1197820, 1253104, 1566380, 2036294, 2395640, 3132760, 4072588, 4791280, 5090735, 6265520, 8145176, 10181470, 16290352, 20362940, 40725880, 81451760]

約数ペア:

[(1, 81451760), (2, 40725880), (4, 20362940), (5, 16290352), (8, 10181470), (10, 8145176), (13, 6265520), (16, 5090735), (17, 4791280), (20, 4072588), (26, 3132760), (34, 2395640), (40, 2036294), (52, 1566380), (65, 1253104), (68, 1197820), (80, 1018147), (85, 958256), (104, 783190), (130, 626552), (136, 598910), (170, 479128), (208, 391595), (221, 368560), (260, 313276), (271, 300560), (272, 299455), (289, 281840), (340, 239564), (442, 184280), (520, 156638), (542, 150280), (578, 140920), (680, 119782), (884, 92140), (1040, 78319), (1084, 75140), (1105, 73712), (1156, 70460), (1355, 60112), (1360, 59891), (1445, 56368), (1768, 46070), (2168, 37570), (2210, 36856), (2312, 35230), (2710, 30056), (2890, 28184), (3523, 23120), (3536, 23035), (3757, 21680), (4336, 18785), (4420, 18428), (4607, 17680), (4624, 17615), (5420, 15028), (5780, 14092), (7046, 11560), (7514, 10840), (8840, 9214)]