400449920

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{48131}}^1$

素因数の和:48163

約数の個数: 64

約数和(自身を含む): 1030987440

約数和(自身を除く): 630537520

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, 48131, 96262, 192524, 240655, 385048, 481310, 625703, 770096, 962620, 1251406, 1540192, 1925240, 2502812, 3080384, 3128515, 3850480, 5005624, 6160768, 6257030, 7700960, 10011248, 12514060, 15401920, 20022496, 25028120, 30803840, 40044992, 50056240, 80089984, 100112480, 200224960, 400449920]

約数ペア:

[(1, 400449920), (2, 200224960), (4, 100112480), (5, 80089984), (8, 50056240), (10, 40044992), (13, 30803840), (16, 25028120), (20, 20022496), (26, 15401920), (32, 12514060), (40, 10011248), (52, 7700960), (64, 6257030), (65, 6160768), (80, 5005624), (104, 3850480), (128, 3128515), (130, 3080384), (160, 2502812), (208, 1925240), (260, 1540192), (320, 1251406), (416, 962620), (520, 770096), (640, 625703), (832, 481310), (1040, 385048), (1664, 240655), (2080, 192524), (4160, 96262), (8320, 48131)]