20465920

素因数分解:

$2^8\times 5^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:351

約数の個数: 72

約数和(自身を含む): 50037120

約数和(自身を除く): 29571200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 128, 160, 236, 256, 271, 295, 320, 472, 542, 590, 640, 944, 1084, 1180, 1280, 1355, 1888, 2168, 2360, 2710, 3776, 4336, 4720, 5420, 7552, 8672, 9440, 10840, 15104, 15989, 17344, 18880, 21680, 31978, 34688, 37760, 43360, 63956, 69376, 75520, 79945, 86720, 127912, 159890, 173440, 255824, 319780, 346880, 511648, 639560, 1023296, 1279120, 2046592, 2558240, 4093184, 5116480, 10232960, 20465920]

約数ペア:

[(1, 20465920), (2, 10232960), (4, 5116480), (5, 4093184), (8, 2558240), (10, 2046592), (16, 1279120), (20, 1023296), (32, 639560), (40, 511648), (59, 346880), (64, 319780), (80, 255824), (118, 173440), (128, 159890), (160, 127912), (236, 86720), (256, 79945), (271, 75520), (295, 69376), (320, 63956), (472, 43360), (542, 37760), (590, 34688), (640, 31978), (944, 21680), (1084, 18880), (1180, 17344), (1280, 15989), (1355, 15104), (1888, 10840), (2168, 9440), (2360, 8672), (2710, 7552), (3776, 5420), (4336, 4720)]