1285459880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{643}}^1$

素因数の和:771

約数の個数: 128

約数和(自身を含む): 3154878720

約数和(自身を除く): 1869418840

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 41, 46, 53, 82, 92, 106, 115, 164, 184, 205, 212, 230, 265, 328, 410, 424, 460, 530, 643, 820, 920, 943, 1060, 1219, 1286, 1640, 1886, 2120, 2173, 2438, 2572, 3215, 3772, 4346, 4715, 4876, 5144, 6095, 6430, 7544, 8692, 9430, 9752, 10865, 12190, 12860, 14789, 17384, 18860, 21730, 24380, 25720, 26363, 29578, 34079, 37720, 43460, 48760, 49979, 52726, 59156, 68158, 73945, 86920, 99958, 105452, 118312, 131815, 136316, 147890, 170395, 199916, 210904, 249895, 263630, 272632, 295780, 340790, 399832, 499790, 527260, 591560, 606349, 681580, 783817, 999580, 1054520, 1212698, 1363160, 1397239, 1567634, 1999160, 2425396, 2794478, 3031745, 3135268, 3919085, 4850792, 5588956, 6063490, 6270536, 6986195, 7838170, 11177912, 12126980, 13972390, 15676340, 24253960, 27944780, 31352680, 32136497, 55889560, 64272994, 128545988, 160682485, 257091976, 321364970, 642729940, 1285459880]

約数ペア:

[(1, 1285459880), (2, 642729940), (4, 321364970), (5, 257091976), (8, 160682485), (10, 128545988), (20, 64272994), (23, 55889560), (40, 32136497), (41, 31352680), (46, 27944780), (53, 24253960), (82, 15676340), (92, 13972390), (106, 12126980), (115, 11177912), (164, 7838170), (184, 6986195), (205, 6270536), (212, 6063490), (230, 5588956), (265, 4850792), (328, 3919085), (410, 3135268), (424, 3031745), (460, 2794478), (530, 2425396), (643, 1999160), (820, 1567634), (920, 1397239), (943, 1363160), (1060, 1212698), (1219, 1054520), (1286, 999580), (1640, 783817), (1886, 681580), (2120, 606349), (2173, 591560), (2438, 527260), (2572, 499790), (3215, 399832), (3772, 340790), (4346, 295780), (4715, 272632), (4876, 263630), (5144, 249895), (6095, 210904), (6430, 199916), (7544, 170395), (8692, 147890), (9430, 136316), (9752, 131815), (10865, 118312), (12190, 105452), (12860, 99958), (14789, 86920), (17384, 73945), (18860, 68158), (21730, 59156), (24380, 52726), (25720, 49979), (26363, 48760), (29578, 43460), (34079, 37720)]