20461000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:144

約数の個数: 128

約数和(自身を含む): 56908800

約数和(自身を除く): 36447800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 37, 40, 50, 56, 70, 74, 79, 100, 125, 140, 148, 158, 175, 185, 200, 250, 259, 280, 296, 316, 350, 370, 395, 500, 518, 553, 632, 700, 740, 790, 875, 925, 1000, 1036, 1106, 1295, 1400, 1480, 1580, 1750, 1850, 1975, 2072, 2212, 2590, 2765, 2923, 3160, 3500, 3700, 3950, 4424, 4625, 5180, 5530, 5846, 6475, 7000, 7400, 7900, 9250, 9875, 10360, 11060, 11692, 12950, 13825, 14615, 15800, 18500, 19750, 20461, 22120, 23384, 25900, 27650, 29230, 32375, 37000, 39500, 40922, 51800, 55300, 58460, 64750, 69125, 73075, 79000, 81844, 102305, 110600, 116920, 129500, 138250, 146150, 163688, 204610, 259000, 276500, 292300, 365375, 409220, 511525, 553000, 584600, 730750, 818440, 1023050, 1461500, 2046100, 2557625, 2923000, 4092200, 5115250, 10230500, 20461000]

約数ペア:

[(1, 20461000), (2, 10230500), (4, 5115250), (5, 4092200), (7, 2923000), (8, 2557625), (10, 2046100), (14, 1461500), (20, 1023050), (25, 818440), (28, 730750), (35, 584600), (37, 553000), (40, 511525), (50, 409220), (56, 365375), (70, 292300), (74, 276500), (79, 259000), (100, 204610), (125, 163688), (140, 146150), (148, 138250), (158, 129500), (175, 116920), (185, 110600), (200, 102305), (250, 81844), (259, 79000), (280, 73075), (296, 69125), (316, 64750), (350, 58460), (370, 55300), (395, 51800), (500, 40922), (518, 39500), (553, 37000), (632, 32375), (700, 29230), (740, 27650), (790, 25900), (875, 23384), (925, 22120), (1000, 20461), (1036, 19750), (1106, 18500), (1295, 15800), (1400, 14615), (1480, 13825), (1580, 12950), (1750, 11692), (1850, 11060), (1975, 10360), (2072, 9875), (2212, 9250), (2590, 7900), (2765, 7400), (2923, 7000), (3160, 6475), (3500, 5846), (3700, 5530), (3950, 5180), (4424, 4625)]