20168952800

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{319129}}^1$

素因数の和:319228

約数の個数: 72

約数和(自身を含む): 49860871200

約数和(自身を除く): 29691918400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 316, 395, 400, 632, 790, 800, 1264, 1580, 1975, 2528, 3160, 3950, 6320, 7900, 12640, 15800, 31600, 63200, 319129, 638258, 1276516, 1595645, 2553032, 3191290, 5106064, 6382580, 7978225, 10212128, 12765160, 15956450, 25211191, 25530320, 31912900, 50422382, 51060640, 63825800, 100844764, 126055955, 127651600, 201689528, 252111910, 255303200, 403379056, 504223820, 630279775, 806758112, 1008447640, 1260559550, 2016895280, 2521119100, 4033790560, 5042238200, 10084476400, 20168952800]

約数ペア:

[(1, 20168952800), (2, 10084476400), (4, 5042238200), (5, 4033790560), (8, 2521119100), (10, 2016895280), (16, 1260559550), (20, 1008447640), (25, 806758112), (32, 630279775), (40, 504223820), (50, 403379056), (79, 255303200), (80, 252111910), (100, 201689528), (158, 127651600), (160, 126055955), (200, 100844764), (316, 63825800), (395, 51060640), (400, 50422382), (632, 31912900), (790, 25530320), (800, 25211191), (1264, 15956450), (1580, 12765160), (1975, 10212128), (2528, 7978225), (3160, 6382580), (3950, 5106064), (6320, 3191290), (7900, 2553032), (12640, 1595645), (15800, 1276516), (31600, 638258), (63200, 319129)]