81061760

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9743}}^1$

素因数の和:9775

約数の個数: 64

約数和(自身を含む): 208716480

約数和(自身を除く): 127654720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 4160, 8320, 9743, 19486, 38972, 48715, 77944, 97430, 126659, 155888, 194860, 253318, 311776, 389720, 506636, 623552, 633295, 779440, 1013272, 1247104, 1266590, 1558880, 2026544, 2533180, 3117760, 4053088, 5066360, 6235520, 8106176, 10132720, 16212352, 20265440, 40530880, 81061760]

約数ペア:

[(1, 81061760), (2, 40530880), (4, 20265440), (5, 16212352), (8, 10132720), (10, 8106176), (13, 6235520), (16, 5066360), (20, 4053088), (26, 3117760), (32, 2533180), (40, 2026544), (52, 1558880), (64, 1266590), (65, 1247104), (80, 1013272), (104, 779440), (128, 633295), (130, 623552), (160, 506636), (208, 389720), (260, 311776), (320, 253318), (416, 194860), (520, 155888), (640, 126659), (832, 97430), (1040, 77944), (1664, 48715), (2080, 38972), (4160, 19486), (8320, 9743)]