20983040

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^2\times {\mathrm{97}}^1$

素因数の和:144

約数の個数: 108

約数和(自身を含む): 54985644

約数和(自身を除く): 34002604

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 97, 104, 128, 130, 160, 169, 194, 208, 256, 260, 320, 338, 388, 416, 485, 520, 640, 676, 776, 832, 845, 970, 1040, 1261, 1280, 1352, 1552, 1664, 1690, 1940, 2080, 2522, 2704, 3104, 3328, 3380, 3880, 4160, 5044, 5408, 6208, 6305, 6760, 7760, 8320, 10088, 10816, 12416, 12610, 13520, 15520, 16393, 16640, 20176, 21632, 24832, 25220, 27040, 31040, 32786, 40352, 43264, 50440, 54080, 62080, 65572, 80704, 81965, 100880, 108160, 124160, 131144, 161408, 163930, 201760, 216320, 262288, 322816, 327860, 403520, 524576, 655720, 807040, 1049152, 1311440, 1614080, 2098304, 2622880, 4196608, 5245760, 10491520, 20983040]

約数ペア:

[(1, 20983040), (2, 10491520), (4, 5245760), (5, 4196608), (8, 2622880), (10, 2098304), (13, 1614080), (16, 1311440), (20, 1049152), (26, 807040), (32, 655720), (40, 524576), (52, 403520), (64, 327860), (65, 322816), (80, 262288), (97, 216320), (104, 201760), (128, 163930), (130, 161408), (160, 131144), (169, 124160), (194, 108160), (208, 100880), (256, 81965), (260, 80704), (320, 65572), (338, 62080), (388, 54080), (416, 50440), (485, 43264), (520, 40352), (640, 32786), (676, 31040), (776, 27040), (832, 25220), (845, 24832), (970, 21632), (1040, 20176), (1261, 16640), (1280, 16393), (1352, 15520), (1552, 13520), (1664, 12610), (1690, 12416), (1940, 10816), (2080, 10088), (2522, 8320), (2704, 7760), (3104, 6760), (3328, 6305), (3380, 6208), (3880, 5408), (4160, 5044)]