201997980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{271}}^1$

素因数の和:428

約数の個数: 144

約数和(自身を含む): 636225408

約数和(自身を除く): 434227428

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 41, 45, 60, 82, 90, 101, 123, 164, 180, 202, 205, 246, 271, 303, 369, 404, 410, 492, 505, 542, 606, 615, 738, 813, 820, 909, 1010, 1084, 1212, 1230, 1355, 1476, 1515, 1626, 1818, 1845, 2020, 2439, 2460, 2710, 3030, 3252, 3636, 3690, 4065, 4141, 4545, 4878, 5420, 6060, 7380, 8130, 8282, 9090, 9756, 11111, 12195, 12423, 16260, 16564, 18180, 20705, 22222, 24390, 24846, 27371, 33333, 37269, 41410, 44444, 48780, 49692, 54742, 55555, 62115, 66666, 74538, 82113, 82820, 99999, 109484, 111110, 124230, 133332, 136855, 149076, 164226, 166665, 186345, 199998, 222220, 246339, 248460, 273710, 328452, 333330, 372690, 399996, 410565, 492678, 499995, 547420, 666660, 745380, 821130, 985356, 999990, 1122211, 1231695, 1642260, 1999980, 2244422, 2463390, 3366633, 4488844, 4926780, 5611055, 6733266, 10099899, 11222110, 13466532, 16833165, 20199798, 22444220, 33666330, 40399596, 50499495, 67332660, 100998990, 201997980]

約数ペア:

[(1, 201997980), (2, 100998990), (3, 67332660), (4, 50499495), (5, 40399596), (6, 33666330), (9, 22444220), (10, 20199798), (12, 16833165), (15, 13466532), (18, 11222110), (20, 10099899), (30, 6733266), (36, 5611055), (41, 4926780), (45, 4488844), (60, 3366633), (82, 2463390), (90, 2244422), (101, 1999980), (123, 1642260), (164, 1231695), (180, 1122211), (202, 999990), (205, 985356), (246, 821130), (271, 745380), (303, 666660), (369, 547420), (404, 499995), (410, 492678), (492, 410565), (505, 399996), (542, 372690), (606, 333330), (615, 328452), (738, 273710), (813, 248460), (820, 246339), (909, 222220), (1010, 199998), (1084, 186345), (1212, 166665), (1230, 164226), (1355, 149076), (1476, 136855), (1515, 133332), (1626, 124230), (1818, 111110), (1845, 109484), (2020, 99999), (2439, 82820), (2460, 82113), (2710, 74538), (3030, 66666), (3252, 62115), (3636, 55555), (3690, 54742), (4065, 49692), (4141, 48780), (4545, 44444), (4878, 41410), (5420, 37269), (6060, 33333), (7380, 27371), (8130, 24846), (8282, 24390), (9090, 22222), (9756, 20705), (11111, 18180), (12195, 16564), (12423, 16260)]