208455720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1999}}^1$

素因数の和:2103

約数の個数: 128

約数和(自身を含む): 691200000

約数和(自身を除く): 482744280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 79, 88, 110, 120, 132, 158, 165, 220, 237, 264, 316, 330, 395, 440, 474, 632, 660, 790, 869, 948, 1185, 1320, 1580, 1738, 1896, 1999, 2370, 2607, 3160, 3476, 3998, 4345, 4740, 5214, 5997, 6952, 7996, 8690, 9480, 9995, 10428, 11994, 13035, 15992, 17380, 19990, 20856, 21989, 23988, 26070, 29985, 34760, 39980, 43978, 47976, 52140, 59970, 65967, 79960, 87956, 104280, 109945, 119940, 131934, 157921, 175912, 219890, 239880, 263868, 315842, 329835, 439780, 473763, 527736, 631684, 659670, 789605, 879560, 947526, 1263368, 1319340, 1579210, 1737131, 1895052, 2368815, 2638680, 3158420, 3474262, 3790104, 4737630, 5211393, 6316840, 6948524, 8685655, 9475260, 10422786, 13897048, 17371310, 18950520, 20845572, 26056965, 34742620, 41691144, 52113930, 69485240, 104227860, 208455720]

約数ペア:

[(1, 208455720), (2, 104227860), (3, 69485240), (4, 52113930), (5, 41691144), (6, 34742620), (8, 26056965), (10, 20845572), (11, 18950520), (12, 17371310), (15, 13897048), (20, 10422786), (22, 9475260), (24, 8685655), (30, 6948524), (33, 6316840), (40, 5211393), (44, 4737630), (55, 3790104), (60, 3474262), (66, 3158420), (79, 2638680), (88, 2368815), (110, 1895052), (120, 1737131), (132, 1579210), (158, 1319340), (165, 1263368), (220, 947526), (237, 879560), (264, 789605), (316, 659670), (330, 631684), (395, 527736), (440, 473763), (474, 439780), (632, 329835), (660, 315842), (790, 263868), (869, 239880), (948, 219890), (1185, 175912), (1320, 157921), (1580, 131934), (1738, 119940), (1896, 109945), (1999, 104280), (2370, 87956), (2607, 79960), (3160, 65967), (3476, 59970), (3998, 52140), (4345, 47976), (4740, 43978), (5214, 39980), (5997, 34760), (6952, 29985), (7996, 26070), (8690, 23988), (9480, 21989), (9995, 20856), (10428, 19990), (11994, 17380), (13035, 15992)]