20965880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1753}}^1$

素因数の和:1800

約数の個数: 64

約数和(自身を含む): 53040960

約数和(自身を除く): 32075080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 184, 230, 260, 299, 460, 520, 598, 920, 1196, 1495, 1753, 2392, 2990, 3506, 5980, 7012, 8765, 11960, 14024, 17530, 22789, 35060, 40319, 45578, 70120, 80638, 91156, 113945, 161276, 182312, 201595, 227890, 322552, 403190, 455780, 524147, 806380, 911560, 1048294, 1612760, 2096588, 2620735, 4193176, 5241470, 10482940, 20965880]

約数ペア:

[(1, 20965880), (2, 10482940), (4, 5241470), (5, 4193176), (8, 2620735), (10, 2096588), (13, 1612760), (20, 1048294), (23, 911560), (26, 806380), (40, 524147), (46, 455780), (52, 403190), (65, 322552), (92, 227890), (104, 201595), (115, 182312), (130, 161276), (184, 113945), (230, 91156), (260, 80638), (299, 70120), (460, 45578), (520, 40319), (598, 35060), (920, 22789), (1196, 17530), (1495, 14024), (1753, 11960), (2392, 8765), (2990, 7012), (3506, 5980)]