19906005

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:155

約数の個数: 64

約数和(自身を含む): 38361600

約数和(自身を除く): 18455595

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 53, 73, 105, 147, 159, 219, 245, 265, 343, 365, 371, 511, 735, 795, 1029, 1095, 1113, 1533, 1715, 1855, 2555, 2597, 3577, 3869, 5145, 5565, 7665, 7791, 10731, 11607, 12985, 17885, 18179, 19345, 25039, 27083, 38955, 53655, 54537, 58035, 75117, 81249, 90895, 125195, 135415, 189581, 272685, 375585, 406245, 568743, 947905, 1327067, 2843715, 3981201, 6635335, 19906005]

約数ペア:

[(1, 19906005), (3, 6635335), (5, 3981201), (7, 2843715), (15, 1327067), (21, 947905), (35, 568743), (49, 406245), (53, 375585), (73, 272685), (105, 189581), (147, 135415), (159, 125195), (219, 90895), (245, 81249), (265, 75117), (343, 58035), (365, 54537), (371, 53655), (511, 38955), (735, 27083), (795, 25039), (1029, 19345), (1095, 18179), (1113, 17885), (1533, 12985), (1715, 11607), (1855, 10731), (2555, 7791), (2597, 7665), (3577, 5565), (3869, 5145)]