20788280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1609}}^1$

素因数の和:1656

約数の個数: 64

約数和(自身を含む): 52164000

約数和(自身を除く): 31375720

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1609, 1615, 2584, 3218, 3230, 6436, 6460, 8045, 12872, 12920, 16090, 27353, 30571, 32180, 54706, 61142, 64360, 109412, 122284, 136765, 152855, 218824, 244568, 273530, 305710, 519707, 547060, 611420, 1039414, 1094120, 1222840, 2078828, 2598535, 4157656, 5197070, 10394140, 20788280]

約数ペア:

[(1, 20788280), (2, 10394140), (4, 5197070), (5, 4157656), (8, 2598535), (10, 2078828), (17, 1222840), (19, 1094120), (20, 1039414), (34, 611420), (38, 547060), (40, 519707), (68, 305710), (76, 273530), (85, 244568), (95, 218824), (136, 152855), (152, 136765), (170, 122284), (190, 109412), (323, 64360), (340, 61142), (380, 54706), (646, 32180), (680, 30571), (760, 27353), (1292, 16090), (1609, 12920), (1615, 12872), (2584, 8045), (3218, 6460), (3230, 6436)]