20813000

素因数分解:

$2^3\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1601}}^1$

素因数の和:1635

約数の個数: 64

約数和(自身を含む): 52481520

約数和(自身を除く): 31668520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 200, 250, 260, 325, 500, 520, 650, 1000, 1300, 1601, 1625, 2600, 3202, 3250, 6404, 6500, 8005, 12808, 13000, 16010, 20813, 32020, 40025, 41626, 64040, 80050, 83252, 104065, 160100, 166504, 200125, 208130, 320200, 400250, 416260, 520325, 800500, 832520, 1040650, 1601000, 2081300, 2601625, 4162600, 5203250, 10406500, 20813000]

約数ペア:

[(1, 20813000), (2, 10406500), (4, 5203250), (5, 4162600), (8, 2601625), (10, 2081300), (13, 1601000), (20, 1040650), (25, 832520), (26, 800500), (40, 520325), (50, 416260), (52, 400250), (65, 320200), (100, 208130), (104, 200125), (125, 166504), (130, 160100), (200, 104065), (250, 83252), (260, 80050), (325, 64040), (500, 41626), (520, 40025), (650, 32020), (1000, 20813), (1300, 16010), (1601, 13000), (1625, 12808), (2600, 8005), (3202, 6500), (3250, 6404)]