20100720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1373}}^1$

素因数の和:1450

約数の個数: 80

約数和(自身を含む): 63379872

約数和(自身を除く): 43279152

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 61, 80, 120, 122, 183, 240, 244, 305, 366, 488, 610, 732, 915, 976, 1220, 1373, 1464, 1830, 2440, 2746, 2928, 3660, 4119, 4880, 5492, 6865, 7320, 8238, 10984, 13730, 14640, 16476, 20595, 21968, 27460, 32952, 41190, 54920, 65904, 82380, 83753, 109840, 164760, 167506, 251259, 329520, 335012, 418765, 502518, 670024, 837530, 1005036, 1256295, 1340048, 1675060, 2010072, 2512590, 3350120, 4020144, 5025180, 6700240, 10050360, 20100720]

約数ペア:

[(1, 20100720), (2, 10050360), (3, 6700240), (4, 5025180), (5, 4020144), (6, 3350120), (8, 2512590), (10, 2010072), (12, 1675060), (15, 1340048), (16, 1256295), (20, 1005036), (24, 837530), (30, 670024), (40, 502518), (48, 418765), (60, 335012), (61, 329520), (80, 251259), (120, 167506), (122, 164760), (183, 109840), (240, 83753), (244, 82380), (305, 65904), (366, 54920), (488, 41190), (610, 32952), (732, 27460), (915, 21968), (976, 20595), (1220, 16476), (1373, 14640), (1464, 13730), (1830, 10984), (2440, 8238), (2746, 7320), (2928, 6865), (3660, 5492), (4119, 4880)]