28140520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{607}}^1$

素因数の和:698

約数の個数: 64

約数和(自身を含む): 67852800

約数和(自身を除く): 39712280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 61, 76, 95, 122, 152, 190, 244, 305, 380, 488, 607, 610, 760, 1159, 1214, 1220, 2318, 2428, 2440, 3035, 4636, 4856, 5795, 6070, 9272, 11533, 11590, 12140, 23066, 23180, 24280, 37027, 46132, 46360, 57665, 74054, 92264, 115330, 148108, 185135, 230660, 296216, 370270, 461320, 703513, 740540, 1407026, 1481080, 2814052, 3517565, 5628104, 7035130, 14070260, 28140520]

約数ペア:

[(1, 28140520), (2, 14070260), (4, 7035130), (5, 5628104), (8, 3517565), (10, 2814052), (19, 1481080), (20, 1407026), (38, 740540), (40, 703513), (61, 461320), (76, 370270), (95, 296216), (122, 230660), (152, 185135), (190, 148108), (244, 115330), (305, 92264), (380, 74054), (488, 57665), (607, 46360), (610, 46132), (760, 37027), (1159, 24280), (1214, 23180), (1220, 23066), (2318, 12140), (2428, 11590), (2440, 11533), (3035, 9272), (4636, 6070), (4856, 5795)]