28111240

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 66089520

約数和(自身を除く): 37978280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 61, 82, 122, 164, 205, 244, 281, 305, 328, 410, 488, 562, 610, 820, 1124, 1220, 1405, 1640, 2248, 2440, 2501, 2810, 5002, 5620, 10004, 11240, 11521, 12505, 17141, 20008, 23042, 25010, 34282, 46084, 50020, 57605, 68564, 85705, 92168, 100040, 115210, 137128, 171410, 230420, 342820, 460840, 685640, 702781, 1405562, 2811124, 3513905, 5622248, 7027810, 14055620, 28111240]

約数ペア:

[(1, 28111240), (2, 14055620), (4, 7027810), (5, 5622248), (8, 3513905), (10, 2811124), (20, 1405562), (40, 702781), (41, 685640), (61, 460840), (82, 342820), (122, 230420), (164, 171410), (205, 137128), (244, 115210), (281, 100040), (305, 92168), (328, 85705), (410, 68564), (488, 57605), (562, 50020), (610, 46084), (820, 34282), (1124, 25010), (1220, 23042), (1405, 20008), (1640, 17141), (2248, 12505), (2440, 11521), (2501, 11240), (2810, 10004), (5002, 5620)]