20722000

素因数分解:

$2^4\times 5^3\times {\mathrm{13}}^1\times {\mathrm{797}}^1$

素因数の和:833

約数の個数: 80

約数和(自身を含む): 54027792

約数和(自身を除く): 33305792

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 125, 130, 200, 208, 250, 260, 325, 400, 500, 520, 650, 797, 1000, 1040, 1300, 1594, 1625, 2000, 2600, 3188, 3250, 3985, 5200, 6376, 6500, 7970, 10361, 12752, 13000, 15940, 19925, 20722, 26000, 31880, 39850, 41444, 51805, 63760, 79700, 82888, 99625, 103610, 159400, 165776, 199250, 207220, 259025, 318800, 398500, 414440, 518050, 797000, 828880, 1036100, 1295125, 1594000, 2072200, 2590250, 4144400, 5180500, 10361000, 20722000]

約数ペア:

[(1, 20722000), (2, 10361000), (4, 5180500), (5, 4144400), (8, 2590250), (10, 2072200), (13, 1594000), (16, 1295125), (20, 1036100), (25, 828880), (26, 797000), (40, 518050), (50, 414440), (52, 398500), (65, 318800), (80, 259025), (100, 207220), (104, 199250), (125, 165776), (130, 159400), (200, 103610), (208, 99625), (250, 82888), (260, 79700), (325, 63760), (400, 51805), (500, 41444), (520, 39850), (650, 31880), (797, 26000), (1000, 20722), (1040, 19925), (1300, 15940), (1594, 13000), (1625, 12752), (2000, 10361), (2600, 7970), (3188, 6500), (3250, 6376), (3985, 5200)]