9989980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:539

約数の個数: 96

約数和(自身を含む): 28224000

約数和(自身を除く): 18234020

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 499, 572, 715, 770, 910, 998, 1001, 1430, 1540, 1820, 1996, 2002, 2495, 2860, 3493, 4004, 4990, 5005, 5489, 6487, 6986, 9980, 10010, 10978, 12974, 13972, 17465, 20020, 21956, 25948, 27445, 32435, 34930, 38423, 45409, 54890, 64870, 69860, 71357, 76846, 90818, 109780, 129740, 142714, 153692, 181636, 192115, 227045, 285428, 356785, 384230, 454090, 499499, 713570, 768460, 908180, 998998, 1427140, 1997996, 2497495, 4994990, 9989980]

約数ペア:

[(1, 9989980), (2, 4994990), (4, 2497495), (5, 1997996), (7, 1427140), (10, 998998), (11, 908180), (13, 768460), (14, 713570), (20, 499499), (22, 454090), (26, 384230), (28, 356785), (35, 285428), (44, 227045), (52, 192115), (55, 181636), (65, 153692), (70, 142714), (77, 129740), (91, 109780), (110, 90818), (130, 76846), (140, 71357), (143, 69860), (154, 64870), (182, 54890), (220, 45409), (260, 38423), (286, 34930), (308, 32435), (364, 27445), (385, 25948), (455, 21956), (499, 20020), (572, 17465), (715, 13972), (770, 12974), (910, 10978), (998, 10010), (1001, 9980), (1430, 6986), (1540, 6487), (1820, 5489), (1996, 5005), (2002, 4990), (2495, 4004), (2860, 3493)]