20194640

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{479}}^1$

素因数の和:540

約数の個数: 80

約数和(自身を含む): 51425280

約数和(自身を除く): 31230640

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 34, 40, 62, 68, 80, 85, 124, 136, 155, 170, 248, 272, 310, 340, 479, 496, 527, 620, 680, 958, 1054, 1240, 1360, 1916, 2108, 2395, 2480, 2635, 3832, 4216, 4790, 5270, 7664, 8143, 8432, 9580, 10540, 14849, 16286, 19160, 21080, 29698, 32572, 38320, 40715, 42160, 59396, 65144, 74245, 81430, 118792, 130288, 148490, 162860, 237584, 252433, 296980, 325720, 504866, 593960, 651440, 1009732, 1187920, 1262165, 2019464, 2524330, 4038928, 5048660, 10097320, 20194640]

約数ペア:

[(1, 20194640), (2, 10097320), (4, 5048660), (5, 4038928), (8, 2524330), (10, 2019464), (16, 1262165), (17, 1187920), (20, 1009732), (31, 651440), (34, 593960), (40, 504866), (62, 325720), (68, 296980), (80, 252433), (85, 237584), (124, 162860), (136, 148490), (155, 130288), (170, 118792), (248, 81430), (272, 74245), (310, 65144), (340, 59396), (479, 42160), (496, 40715), (527, 38320), (620, 32572), (680, 29698), (958, 21080), (1054, 19160), (1240, 16286), (1360, 14849), (1916, 10540), (2108, 9580), (2395, 8432), (2480, 8143), (2635, 7664), (3832, 5270), (4216, 4790)]