20108900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1249}}^1$

素因数の和:1293

約数の個数: 72

約数和(自身を含む): 52080000

約数和(自身を除く): 31971100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 25, 28, 35, 46, 50, 70, 92, 100, 115, 140, 161, 175, 230, 322, 350, 460, 575, 644, 700, 805, 1150, 1249, 1610, 2300, 2498, 3220, 4025, 4996, 6245, 8050, 8743, 12490, 16100, 17486, 24980, 28727, 31225, 34972, 43715, 57454, 62450, 87430, 114908, 124900, 143635, 174860, 201089, 218575, 287270, 402178, 437150, 574540, 718175, 804356, 874300, 1005445, 1436350, 2010890, 2872700, 4021780, 5027225, 10054450, 20108900]

約数ペア:

[(1, 20108900), (2, 10054450), (4, 5027225), (5, 4021780), (7, 2872700), (10, 2010890), (14, 1436350), (20, 1005445), (23, 874300), (25, 804356), (28, 718175), (35, 574540), (46, 437150), (50, 402178), (70, 287270), (92, 218575), (100, 201089), (115, 174860), (140, 143635), (161, 124900), (175, 114908), (230, 87430), (322, 62450), (350, 57454), (460, 43715), (575, 34972), (644, 31225), (700, 28727), (805, 24980), (1150, 17486), (1249, 16100), (1610, 12490), (2300, 8743), (2498, 8050), (3220, 6245), (4025, 4996)]