21995000

素因数分解:

$2^3\times 5^4\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:162

約数の個数: 80

約数和(自身を含む): 53139240

約数和(自身を除く): 31144240

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 53, 83, 100, 106, 125, 166, 200, 212, 250, 265, 332, 415, 424, 500, 530, 625, 664, 830, 1000, 1060, 1250, 1325, 1660, 2075, 2120, 2500, 2650, 3320, 4150, 4399, 5000, 5300, 6625, 8300, 8798, 10375, 10600, 13250, 16600, 17596, 20750, 21995, 26500, 33125, 35192, 41500, 43990, 51875, 53000, 66250, 83000, 87980, 103750, 109975, 132500, 175960, 207500, 219950, 265000, 415000, 439900, 549875, 879800, 1099750, 2199500, 2749375, 4399000, 5498750, 10997500, 21995000]

約数ペア:

[(1, 21995000), (2, 10997500), (4, 5498750), (5, 4399000), (8, 2749375), (10, 2199500), (20, 1099750), (25, 879800), (40, 549875), (50, 439900), (53, 415000), (83, 265000), (100, 219950), (106, 207500), (125, 175960), (166, 132500), (200, 109975), (212, 103750), (250, 87980), (265, 83000), (332, 66250), (415, 53000), (424, 51875), (500, 43990), (530, 41500), (625, 35192), (664, 33125), (830, 26500), (1000, 21995), (1060, 20750), (1250, 17596), (1325, 16600), (1660, 13250), (2075, 10600), (2120, 10375), (2500, 8798), (2650, 8300), (3320, 6625), (4150, 5300), (4399, 5000)]