1998993080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{1229}}^1$

素因数の和:1441

約数の個数: 128

約数和(自身を含む): 5317142400

約数和(自身を除く): 3318149320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 140, 148, 157, 185, 259, 280, 296, 314, 370, 518, 628, 740, 785, 1036, 1099, 1229, 1256, 1295, 1480, 1570, 2072, 2198, 2458, 2590, 3140, 4396, 4916, 5180, 5495, 5809, 6145, 6280, 8603, 8792, 9832, 10360, 10990, 11618, 12290, 17206, 21980, 23236, 24580, 29045, 34412, 40663, 43015, 43960, 45473, 46472, 49160, 58090, 68824, 81326, 86030, 90946, 116180, 162652, 172060, 181892, 192953, 203315, 227365, 232360, 318311, 325304, 344120, 363784, 385906, 406630, 454730, 636622, 771812, 813260, 909460, 964765, 1273244, 1350671, 1543624, 1591555, 1626520, 1818920, 1929530, 2546488, 2701342, 3183110, 3859060, 5402684, 6366220, 6753355, 7139261, 7718120, 10805368, 12732440, 13506710, 14278522, 27013420, 28557044, 35696305, 49974827, 54026840, 57114088, 71392610, 99949654, 142785220, 199899308, 249874135, 285570440, 399798616, 499748270, 999496540, 1998993080]

約数ペア:

[(1, 1998993080), (2, 999496540), (4, 499748270), (5, 399798616), (7, 285570440), (8, 249874135), (10, 199899308), (14, 142785220), (20, 99949654), (28, 71392610), (35, 57114088), (37, 54026840), (40, 49974827), (56, 35696305), (70, 28557044), (74, 27013420), (140, 14278522), (148, 13506710), (157, 12732440), (185, 10805368), (259, 7718120), (280, 7139261), (296, 6753355), (314, 6366220), (370, 5402684), (518, 3859060), (628, 3183110), (740, 2701342), (785, 2546488), (1036, 1929530), (1099, 1818920), (1229, 1626520), (1256, 1591555), (1295, 1543624), (1480, 1350671), (1570, 1273244), (2072, 964765), (2198, 909460), (2458, 813260), (2590, 771812), (3140, 636622), (4396, 454730), (4916, 406630), (5180, 385906), (5495, 363784), (5809, 344120), (6145, 325304), (6280, 318311), (8603, 232360), (8792, 227365), (9832, 203315), (10360, 192953), (10990, 181892), (11618, 172060), (12290, 162652), (17206, 116180), (21980, 90946), (23236, 86030), (24580, 81326), (29045, 68824), (34412, 58090), (40663, 49160), (43015, 46472), (43960, 45473)]