81649960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1789}}^1$

素因数の和:1970

約数の個数: 64

約数和(自身を含む): 211363200

約数和(自身を除く): 129713240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 163, 280, 326, 652, 815, 1141, 1304, 1630, 1789, 2282, 3260, 3578, 4564, 5705, 6520, 7156, 8945, 9128, 11410, 12523, 14312, 17890, 22820, 25046, 35780, 45640, 50092, 62615, 71560, 100184, 125230, 250460, 291607, 500920, 583214, 1166428, 1458035, 2041249, 2332856, 2916070, 4082498, 5832140, 8164996, 10206245, 11664280, 16329992, 20412490, 40824980, 81649960]

約数ペア:

[(1, 81649960), (2, 40824980), (4, 20412490), (5, 16329992), (7, 11664280), (8, 10206245), (10, 8164996), (14, 5832140), (20, 4082498), (28, 2916070), (35, 2332856), (40, 2041249), (56, 1458035), (70, 1166428), (140, 583214), (163, 500920), (280, 291607), (326, 250460), (652, 125230), (815, 100184), (1141, 71560), (1304, 62615), (1630, 50092), (1789, 45640), (2282, 35780), (3260, 25046), (3578, 22820), (4564, 17890), (5705, 14312), (6520, 12523), (7156, 11410), (8945, 9128)]