82780020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2311}}^1$

素因数の和:2525

約数の個数: 72

約数和(自身を含む): 252470400

約数和(自身を除く): 169690380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 199, 398, 597, 796, 995, 1194, 1791, 1990, 2311, 2388, 2985, 3582, 3980, 4622, 5970, 6933, 7164, 8955, 9244, 11555, 11940, 13866, 17910, 20799, 23110, 27732, 34665, 35820, 41598, 46220, 69330, 83196, 103995, 138660, 207990, 415980, 459889, 919778, 1379667, 1839556, 2299445, 2759334, 4139001, 4598890, 5518668, 6898335, 8278002, 9197780, 13796670, 16556004, 20695005, 27593340, 41390010, 82780020]

約数ペア:

[(1, 82780020), (2, 41390010), (3, 27593340), (4, 20695005), (5, 16556004), (6, 13796670), (9, 9197780), (10, 8278002), (12, 6898335), (15, 5518668), (18, 4598890), (20, 4139001), (30, 2759334), (36, 2299445), (45, 1839556), (60, 1379667), (90, 919778), (180, 459889), (199, 415980), (398, 207990), (597, 138660), (796, 103995), (995, 83196), (1194, 69330), (1791, 46220), (1990, 41598), (2311, 35820), (2388, 34665), (2985, 27732), (3582, 23110), (3980, 20799), (4622, 17910), (5970, 13866), (6933, 11940), (7164, 11555), (8955, 9244)]