399328640

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^3\times {\mathrm{127}}^1$

素因数の和:197

約数の個数: 128

約数和(自身を含む): 1022284800

約数和(自身を除く): 622956160

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 127, 128, 136, 160, 170, 254, 272, 289, 320, 340, 508, 544, 578, 635, 640, 680, 1016, 1088, 1156, 1270, 1360, 1445, 2032, 2159, 2176, 2312, 2540, 2720, 2890, 4064, 4318, 4624, 4913, 5080, 5440, 5780, 8128, 8636, 9248, 9826, 10160, 10795, 10880, 11560, 16256, 17272, 18496, 19652, 20320, 21590, 23120, 24565, 34544, 36703, 36992, 39304, 40640, 43180, 46240, 49130, 69088, 73406, 78608, 81280, 86360, 92480, 98260, 138176, 146812, 157216, 172720, 183515, 184960, 196520, 276352, 293624, 314432, 345440, 367030, 393040, 587248, 623951, 628864, 690880, 734060, 786080, 1174496, 1247902, 1381760, 1468120, 1572160, 2348992, 2495804, 2936240, 3119755, 3144320, 4697984, 4991608, 5872480, 6239510, 9983216, 11744960, 12479020, 19966432, 23489920, 24958040, 39932864, 49916080, 79865728, 99832160, 199664320, 399328640]

約数ペア:

[(1, 399328640), (2, 199664320), (4, 99832160), (5, 79865728), (8, 49916080), (10, 39932864), (16, 24958040), (17, 23489920), (20, 19966432), (32, 12479020), (34, 11744960), (40, 9983216), (64, 6239510), (68, 5872480), (80, 4991608), (85, 4697984), (127, 3144320), (128, 3119755), (136, 2936240), (160, 2495804), (170, 2348992), (254, 1572160), (272, 1468120), (289, 1381760), (320, 1247902), (340, 1174496), (508, 786080), (544, 734060), (578, 690880), (635, 628864), (640, 623951), (680, 587248), (1016, 393040), (1088, 367030), (1156, 345440), (1270, 314432), (1360, 293624), (1445, 276352), (2032, 196520), (2159, 184960), (2176, 183515), (2312, 172720), (2540, 157216), (2720, 146812), (2890, 138176), (4064, 98260), (4318, 92480), (4624, 86360), (4913, 81280), (5080, 78608), (5440, 73406), (5780, 69088), (8128, 49130), (8636, 46240), (9248, 43180), (9826, 40640), (10160, 39304), (10795, 36992), (10880, 36703), (11560, 34544), (16256, 24565), (17272, 23120), (18496, 21590), (19652, 20320)]