19681720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1$

素因数の和:125

約数の個数: 96

約数和(自身を含む): 49377600

約数和(自身を除く): 29695880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 38, 40, 47, 58, 76, 94, 95, 116, 145, 152, 188, 190, 232, 235, 290, 361, 376, 380, 470, 551, 580, 722, 760, 893, 940, 1102, 1160, 1363, 1444, 1786, 1805, 1880, 2204, 2726, 2755, 2888, 3572, 3610, 4408, 4465, 5452, 5510, 6815, 7144, 7220, 8930, 10469, 10904, 11020, 13630, 14440, 16967, 17860, 20938, 22040, 25897, 27260, 33934, 35720, 41876, 51794, 52345, 54520, 67868, 83752, 84835, 103588, 104690, 129485, 135736, 169670, 207176, 209380, 258970, 339340, 418760, 492043, 517940, 678680, 984086, 1035880, 1968172, 2460215, 3936344, 4920430, 9840860, 19681720]

約数ペア:

[(1, 19681720), (2, 9840860), (4, 4920430), (5, 3936344), (8, 2460215), (10, 1968172), (19, 1035880), (20, 984086), (29, 678680), (38, 517940), (40, 492043), (47, 418760), (58, 339340), (76, 258970), (94, 209380), (95, 207176), (116, 169670), (145, 135736), (152, 129485), (188, 104690), (190, 103588), (232, 84835), (235, 83752), (290, 67868), (361, 54520), (376, 52345), (380, 51794), (470, 41876), (551, 35720), (580, 33934), (722, 27260), (760, 25897), (893, 22040), (940, 20938), (1102, 17860), (1160, 16967), (1363, 14440), (1444, 13630), (1786, 11020), (1805, 10904), (1880, 10469), (2204, 8930), (2726, 7220), (2755, 7144), (2888, 6815), (3572, 5510), (3610, 5452), (4408, 4465)]