20442555

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 42112512

約数和(自身を除く): 21669957

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 73, 105, 127, 147, 219, 245, 315, 365, 381, 441, 511, 635, 657, 735, 889, 1095, 1143, 1533, 1905, 2205, 2555, 2667, 3285, 3577, 4445, 4599, 5715, 6223, 7665, 8001, 9271, 10731, 13335, 17885, 18669, 22995, 27813, 31115, 32193, 40005, 46355, 53655, 56007, 64897, 83439, 93345, 139065, 160965, 194691, 280035, 324485, 417195, 454279, 584073, 973455, 1362837, 2271395, 2920365, 4088511, 6814185, 20442555]

約数ペア:

[(1, 20442555), (3, 6814185), (5, 4088511), (7, 2920365), (9, 2271395), (15, 1362837), (21, 973455), (35, 584073), (45, 454279), (49, 417195), (63, 324485), (73, 280035), (105, 194691), (127, 160965), (147, 139065), (219, 93345), (245, 83439), (315, 64897), (365, 56007), (381, 53655), (441, 46355), (511, 40005), (635, 32193), (657, 31115), (735, 27813), (889, 22995), (1095, 18669), (1143, 17885), (1533, 13335), (1905, 10731), (2205, 9271), (2555, 8001), (2667, 7665), (3285, 6223), (3577, 5715), (4445, 4599)]