20804040

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{6421}}^1$

素因数の和:6444

約数の個数: 80

約数和(自身を含む): 69935580

約数和(自身を除く): 49131540

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 270, 324, 360, 405, 540, 648, 810, 1080, 1620, 3240, 6421, 12842, 19263, 25684, 32105, 38526, 51368, 57789, 64210, 77052, 96315, 115578, 128420, 154104, 173367, 192630, 231156, 256840, 288945, 346734, 385260, 462312, 520101, 577890, 693468, 770520, 866835, 1040202, 1155780, 1386936, 1733670, 2080404, 2311560, 2600505, 3467340, 4160808, 5201010, 6934680, 10402020, 20804040]

約数ペア:

[(1, 20804040), (2, 10402020), (3, 6934680), (4, 5201010), (5, 4160808), (6, 3467340), (8, 2600505), (9, 2311560), (10, 2080404), (12, 1733670), (15, 1386936), (18, 1155780), (20, 1040202), (24, 866835), (27, 770520), (30, 693468), (36, 577890), (40, 520101), (45, 462312), (54, 385260), (60, 346734), (72, 288945), (81, 256840), (90, 231156), (108, 192630), (120, 173367), (135, 154104), (162, 128420), (180, 115578), (216, 96315), (270, 77052), (324, 64210), (360, 57789), (405, 51368), (540, 38526), (648, 32105), (810, 25684), (1080, 19263), (1620, 12842), (3240, 6421)]