20208020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:213

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 32046700

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 71, 76, 95, 107, 133, 140, 142, 190, 214, 266, 284, 355, 380, 428, 497, 532, 535, 665, 710, 749, 994, 1070, 1330, 1349, 1420, 1498, 1988, 2033, 2140, 2485, 2660, 2698, 2996, 3745, 4066, 4970, 5396, 6745, 7490, 7597, 8132, 9443, 9940, 10165, 13490, 14231, 14980, 15194, 18886, 20330, 26980, 28462, 30388, 37772, 37985, 40660, 47215, 53179, 56924, 71155, 75970, 94430, 106358, 142310, 144343, 151940, 188860, 212716, 265895, 284620, 288686, 531790, 577372, 721715, 1010401, 1063580, 1443430, 2020802, 2886860, 4041604, 5052005, 10104010, 20208020]

約数ペア:

[(1, 20208020), (2, 10104010), (4, 5052005), (5, 4041604), (7, 2886860), (10, 2020802), (14, 1443430), (19, 1063580), (20, 1010401), (28, 721715), (35, 577372), (38, 531790), (70, 288686), (71, 284620), (76, 265895), (95, 212716), (107, 188860), (133, 151940), (140, 144343), (142, 142310), (190, 106358), (214, 94430), (266, 75970), (284, 71155), (355, 56924), (380, 53179), (428, 47215), (497, 40660), (532, 37985), (535, 37772), (665, 30388), (710, 28462), (749, 26980), (994, 20330), (1070, 18886), (1330, 15194), (1349, 14980), (1420, 14231), (1498, 13490), (1988, 10165), (2033, 9940), (2140, 9443), (2485, 8132), (2660, 7597), (2698, 7490), (2996, 6745), (3745, 5396), (4066, 4970)]