21448280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:409

約数の個数: 96

約数和(自身を含む): 58112640

約数和(自身を除く): 36664360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 49, 56, 62, 70, 98, 124, 140, 155, 196, 217, 245, 248, 280, 310, 353, 392, 434, 490, 620, 706, 868, 980, 1085, 1240, 1412, 1519, 1736, 1765, 1960, 2170, 2471, 2824, 3038, 3530, 4340, 4942, 6076, 7060, 7595, 8680, 9884, 10943, 12152, 12355, 14120, 15190, 17297, 19768, 21886, 24710, 30380, 34594, 43772, 49420, 54715, 60760, 69188, 76601, 86485, 87544, 98840, 109430, 138376, 153202, 172970, 218860, 306404, 345940, 383005, 437720, 536207, 612808, 691880, 766010, 1072414, 1532020, 2144828, 2681035, 3064040, 4289656, 5362070, 10724140, 21448280]

約数ペア:

[(1, 21448280), (2, 10724140), (4, 5362070), (5, 4289656), (7, 3064040), (8, 2681035), (10, 2144828), (14, 1532020), (20, 1072414), (28, 766010), (31, 691880), (35, 612808), (40, 536207), (49, 437720), (56, 383005), (62, 345940), (70, 306404), (98, 218860), (124, 172970), (140, 153202), (155, 138376), (196, 109430), (217, 98840), (245, 87544), (248, 86485), (280, 76601), (310, 69188), (353, 60760), (392, 54715), (434, 49420), (490, 43772), (620, 34594), (706, 30380), (868, 24710), (980, 21886), (1085, 19768), (1240, 17297), (1412, 15190), (1519, 14120), (1736, 12355), (1765, 12152), (1960, 10943), (2170, 9884), (2471, 8680), (2824, 7595), (3038, 7060), (3530, 6076), (4340, 4942)]