15811240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 37739520

約数和(自身を除く): 21928280

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 311, 328, 410, 620, 622, 820, 1240, 1244, 1271, 1555, 1640, 2488, 2542, 3110, 5084, 6220, 6355, 9641, 10168, 12440, 12710, 12751, 19282, 25420, 25502, 38564, 48205, 50840, 51004, 63755, 77128, 96410, 102008, 127510, 192820, 255020, 385640, 395281, 510040, 790562, 1581124, 1976405, 3162248, 3952810, 7905620, 15811240]

約数ペア:

[(1, 15811240), (2, 7905620), (4, 3952810), (5, 3162248), (8, 1976405), (10, 1581124), (20, 790562), (31, 510040), (40, 395281), (41, 385640), (62, 255020), (82, 192820), (124, 127510), (155, 102008), (164, 96410), (205, 77128), (248, 63755), (310, 51004), (311, 50840), (328, 48205), (410, 38564), (620, 25502), (622, 25420), (820, 19282), (1240, 12751), (1244, 12710), (1271, 12440), (1555, 10168), (1640, 9641), (2488, 6355), (2542, 6220), (3110, 5084)]