278820020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{449}}^1\times {\mathrm{509}}^1$

素因数の和:1028

約数の個数: 48

約数和(自身を含む): 597618000

約数和(自身を除く): 318797980

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 449, 509, 610, 898, 1018, 1220, 1796, 2036, 2245, 2545, 4490, 5090, 8980, 10180, 27389, 31049, 54778, 62098, 109556, 124196, 136945, 155245, 228541, 273890, 310490, 457082, 547780, 620980, 914164, 1142705, 2285410, 4570820, 13941001, 27882002, 55764004, 69705005, 139410010, 278820020]

約数ペア:

[(1, 278820020), (2, 139410010), (4, 69705005), (5, 55764004), (10, 27882002), (20, 13941001), (61, 4570820), (122, 2285410), (244, 1142705), (305, 914164), (449, 620980), (509, 547780), (610, 457082), (898, 310490), (1018, 273890), (1220, 228541), (1796, 155245), (2036, 136945), (2245, 124196), (2545, 109556), (4490, 62098), (5090, 54778), (8980, 31049), (10180, 27389)]