81225830

素因数分解:

$2^1\times 5^1\times 7^4\times {\mathrm{17}}^1\times {\mathrm{199}}^1$

素因数の和:251

約数の個数: 80

約数和(自身を含む): 181504800

約数和(自身を除く): 100278970

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 49, 70, 85, 98, 119, 170, 199, 238, 245, 343, 398, 490, 595, 686, 833, 995, 1190, 1393, 1666, 1715, 1990, 2401, 2786, 3383, 3430, 4165, 4802, 5831, 6766, 6965, 8330, 9751, 11662, 12005, 13930, 16915, 19502, 23681, 24010, 29155, 33830, 40817, 47362, 48755, 58310, 68257, 81634, 97510, 118405, 136514, 165767, 204085, 236810, 331534, 341285, 408170, 477799, 682570, 828835, 955598, 1160369, 1657670, 2320738, 2388995, 4777990, 5801845, 8122583, 11603690, 16245166, 40612915, 81225830]

約数ペア:

[(1, 81225830), (2, 40612915), (5, 16245166), (7, 11603690), (10, 8122583), (14, 5801845), (17, 4777990), (34, 2388995), (35, 2320738), (49, 1657670), (70, 1160369), (85, 955598), (98, 828835), (119, 682570), (170, 477799), (199, 408170), (238, 341285), (245, 331534), (343, 236810), (398, 204085), (490, 165767), (595, 136514), (686, 118405), (833, 97510), (995, 81634), (1190, 68257), (1393, 58310), (1666, 48755), (1715, 47362), (1990, 40817), (2401, 33830), (2786, 29155), (3383, 24010), (3430, 23681), (4165, 19502), (4802, 16915), (5831, 13930), (6766, 12005), (6965, 11662), (8330, 9751)]