21580000

素因数分解:

$2^5\times 5^4\times {\mathrm{13}}^1\times {\mathrm{83}}^1$

素因数の和:126

約数の個数: 120

約数和(自身を含む): 57862728

約数和(自身を除く): 36282728

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 83, 100, 104, 125, 130, 160, 166, 200, 208, 250, 260, 325, 332, 400, 415, 416, 500, 520, 625, 650, 664, 800, 830, 1000, 1040, 1079, 1250, 1300, 1328, 1625, 1660, 2000, 2075, 2080, 2158, 2500, 2600, 2656, 3250, 3320, 4000, 4150, 4316, 5000, 5200, 5395, 6500, 6640, 8125, 8300, 8632, 10000, 10375, 10400, 10790, 13000, 13280, 16250, 16600, 17264, 20000, 20750, 21580, 26000, 26975, 32500, 33200, 34528, 41500, 43160, 51875, 52000, 53950, 65000, 66400, 83000, 86320, 103750, 107900, 130000, 134875, 166000, 172640, 207500, 215800, 260000, 269750, 332000, 415000, 431600, 539500, 674375, 830000, 863200, 1079000, 1348750, 1660000, 2158000, 2697500, 4316000, 5395000, 10790000, 21580000]

約数ペア:

[(1, 21580000), (2, 10790000), (4, 5395000), (5, 4316000), (8, 2697500), (10, 2158000), (13, 1660000), (16, 1348750), (20, 1079000), (25, 863200), (26, 830000), (32, 674375), (40, 539500), (50, 431600), (52, 415000), (65, 332000), (80, 269750), (83, 260000), (100, 215800), (104, 207500), (125, 172640), (130, 166000), (160, 134875), (166, 130000), (200, 107900), (208, 103750), (250, 86320), (260, 83000), (325, 66400), (332, 65000), (400, 53950), (415, 52000), (416, 51875), (500, 43160), (520, 41500), (625, 34528), (650, 33200), (664, 32500), (800, 26975), (830, 26000), (1000, 21580), (1040, 20750), (1079, 20000), (1250, 17264), (1300, 16600), (1328, 16250), (1625, 13280), (1660, 13000), (2000, 10790), (2075, 10400), (2080, 10375), (2158, 10000), (2500, 8632), (2600, 8300), (2656, 8125), (3250, 6640), (3320, 6500), (4000, 5395), (4150, 5200), (4316, 5000)]