20485640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{3181}}^1$

素因数の和:3222

約数の個数: 64

約数和(自身を含む): 54984960

約数和(自身を除く): 34499320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3181, 3220, 6362, 6440, 12724, 15905, 22267, 25448, 31810, 44534, 63620, 73163, 89068, 111335, 127240, 146326, 178136, 222670, 292652, 365815, 445340, 512141, 585304, 731630, 890680, 1024282, 1463260, 2048564, 2560705, 2926520, 4097128, 5121410, 10242820, 20485640]

約数ペア:

[(1, 20485640), (2, 10242820), (4, 5121410), (5, 4097128), (7, 2926520), (8, 2560705), (10, 2048564), (14, 1463260), (20, 1024282), (23, 890680), (28, 731630), (35, 585304), (40, 512141), (46, 445340), (56, 365815), (70, 292652), (92, 222670), (115, 178136), (140, 146326), (161, 127240), (184, 111335), (230, 89068), (280, 73163), (322, 63620), (460, 44534), (644, 31810), (805, 25448), (920, 22267), (1288, 15905), (1610, 12724), (3181, 6440), (3220, 6362)]