28670720

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1723}}^1$

素因数の和:1757

約数の個数: 72

約数和(自身を含む): 74000976

約数和(自身を除く): 45330256

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, 1280, 1664, 1723, 2080, 3328, 3446, 4160, 6892, 8320, 8615, 13784, 16640, 17230, 22399, 27568, 34460, 44798, 55136, 68920, 89596, 110272, 111995, 137840, 179192, 220544, 223990, 275680, 358384, 441088, 447980, 551360, 716768, 895960, 1102720, 1433536, 1791920, 2205440, 2867072, 3583840, 5734144, 7167680, 14335360, 28670720]

約数ペア:

[(1, 28670720), (2, 14335360), (4, 7167680), (5, 5734144), (8, 3583840), (10, 2867072), (13, 2205440), (16, 1791920), (20, 1433536), (26, 1102720), (32, 895960), (40, 716768), (52, 551360), (64, 447980), (65, 441088), (80, 358384), (104, 275680), (128, 223990), (130, 220544), (160, 179192), (208, 137840), (256, 111995), (260, 110272), (320, 89596), (416, 68920), (520, 55136), (640, 44798), (832, 34460), (1040, 27568), (1280, 22399), (1664, 17230), (1723, 16640), (2080, 13784), (3328, 8615), (3446, 8320), (4160, 6892)]