20501000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:136

約数の個数: 128

約数和(自身を含む): 55036800

約数和(自身を除く): 34535800

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 25, 26, 38, 40, 50, 52, 65, 76, 83, 95, 100, 104, 125, 130, 152, 166, 190, 200, 247, 250, 260, 325, 332, 380, 415, 475, 494, 500, 520, 650, 664, 760, 830, 950, 988, 1000, 1079, 1235, 1300, 1577, 1625, 1660, 1900, 1976, 2075, 2158, 2375, 2470, 2600, 3154, 3250, 3320, 3800, 4150, 4316, 4750, 4940, 5395, 6175, 6308, 6500, 7885, 8300, 8632, 9500, 9880, 10375, 10790, 12350, 12616, 13000, 15770, 16600, 19000, 20501, 20750, 21580, 24700, 26975, 30875, 31540, 39425, 41002, 41500, 43160, 49400, 53950, 61750, 63080, 78850, 82004, 83000, 102505, 107900, 123500, 134875, 157700, 164008, 197125, 205010, 215800, 247000, 269750, 315400, 394250, 410020, 512525, 539500, 788500, 820040, 1025050, 1079000, 1577000, 2050100, 2562625, 4100200, 5125250, 10250500, 20501000]

約数ペア:

[(1, 20501000), (2, 10250500), (4, 5125250), (5, 4100200), (8, 2562625), (10, 2050100), (13, 1577000), (19, 1079000), (20, 1025050), (25, 820040), (26, 788500), (38, 539500), (40, 512525), (50, 410020), (52, 394250), (65, 315400), (76, 269750), (83, 247000), (95, 215800), (100, 205010), (104, 197125), (125, 164008), (130, 157700), (152, 134875), (166, 123500), (190, 107900), (200, 102505), (247, 83000), (250, 82004), (260, 78850), (325, 63080), (332, 61750), (380, 53950), (415, 49400), (475, 43160), (494, 41500), (500, 41002), (520, 39425), (650, 31540), (664, 30875), (760, 26975), (830, 24700), (950, 21580), (988, 20750), (1000, 20501), (1079, 19000), (1235, 16600), (1300, 15770), (1577, 13000), (1625, 12616), (1660, 12350), (1900, 10790), (1976, 10375), (2075, 9880), (2158, 9500), (2375, 8632), (2470, 8300), (2600, 7885), (3154, 6500), (3250, 6308), (3320, 6175), (3800, 5395), (4150, 4940), (4316, 4750)]