21891680

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2243}}^1$

素因数の和:2319

約数の個数: 48

約数和(自身を含む): 52590384

約数和(自身を除く): 30698704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2243, 2440, 4486, 4880, 8972, 9760, 11215, 17944, 22430, 35888, 44860, 71776, 89720, 136823, 179440, 273646, 358880, 547292, 684115, 1094584, 1368230, 2189168, 2736460, 4378336, 5472920, 10945840, 21891680]

約数ペア:

[(1, 21891680), (2, 10945840), (4, 5472920), (5, 4378336), (8, 2736460), (10, 2189168), (16, 1368230), (20, 1094584), (32, 684115), (40, 547292), (61, 358880), (80, 273646), (122, 179440), (160, 136823), (244, 89720), (305, 71776), (488, 44860), (610, 35888), (976, 22430), (1220, 17944), (1952, 11215), (2243, 9760), (2440, 8972), (4486, 4880)]