1271782720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{305717}}^1$

素因数の和:305747

約数の個数: 56

約数和(自身を含む): 3261399624

約数和(自身を除く): 1989616904

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 305717, 611434, 1222868, 1528585, 2445736, 3057170, 3974321, 4891472, 6114340, 7948642, 9782944, 12228680, 15897284, 19565888, 19871605, 24457360, 31794568, 39743210, 48914720, 63589136, 79486420, 97829440, 127178272, 158972840, 254356544, 317945680, 635891360, 1271782720]

約数ペア:

[(1, 1271782720), (2, 635891360), (4, 317945680), (5, 254356544), (8, 158972840), (10, 127178272), (13, 97829440), (16, 79486420), (20, 63589136), (26, 48914720), (32, 39743210), (40, 31794568), (52, 24457360), (64, 19871605), (65, 19565888), (80, 15897284), (104, 12228680), (130, 9782944), (160, 7948642), (208, 6114340), (260, 4891472), (320, 3974321), (416, 3057170), (520, 2445736), (832, 1528585), (1040, 1222868), (2080, 611434), (4160, 305717)]