20350720

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1223}}^1$

素因数の和:1257

約数の個数: 72

約数和(自身を含む): 52538976

約数和(自身を除く): 32188256

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1223, 1280, 1664, 2080, 2446, 3328, 4160, 4892, 6115, 8320, 9784, 12230, 15899, 16640, 19568, 24460, 31798, 39136, 48920, 63596, 78272, 79495, 97840, 127192, 156544, 158990, 195680, 254384, 313088, 317980, 391360, 508768, 635960, 782720, 1017536, 1271920, 1565440, 2035072, 2543840, 4070144, 5087680, 10175360, 20350720]

約数ペア:

[(1, 20350720), (2, 10175360), (4, 5087680), (5, 4070144), (8, 2543840), (10, 2035072), (13, 1565440), (16, 1271920), (20, 1017536), (26, 782720), (32, 635960), (40, 508768), (52, 391360), (64, 317980), (65, 313088), (80, 254384), (104, 195680), (128, 158990), (130, 156544), (160, 127192), (208, 97840), (256, 79495), (260, 78272), (320, 63596), (416, 48920), (520, 39136), (640, 31798), (832, 24460), (1040, 19568), (1223, 16640), (1280, 15899), (1664, 12230), (2080, 9784), (2446, 8320), (3328, 6115), (4160, 4892)]