20403280

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:224

約数の個数: 80

約数和(自身を含む): 49956624

約数和(自身を除く): 29553344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 61, 74, 80, 113, 122, 148, 185, 226, 244, 296, 305, 370, 452, 488, 565, 592, 610, 740, 904, 976, 1130, 1220, 1480, 1808, 2257, 2260, 2440, 2960, 4181, 4514, 4520, 4880, 6893, 8362, 9028, 9040, 11285, 13786, 16724, 18056, 20905, 22570, 27572, 33448, 34465, 36112, 41810, 45140, 55144, 66896, 68930, 83620, 90280, 110288, 137860, 167240, 180560, 255041, 275720, 334480, 510082, 551440, 1020164, 1275205, 2040328, 2550410, 4080656, 5100820, 10201640, 20403280]

約数ペア:

[(1, 20403280), (2, 10201640), (4, 5100820), (5, 4080656), (8, 2550410), (10, 2040328), (16, 1275205), (20, 1020164), (37, 551440), (40, 510082), (61, 334480), (74, 275720), (80, 255041), (113, 180560), (122, 167240), (148, 137860), (185, 110288), (226, 90280), (244, 83620), (296, 68930), (305, 66896), (370, 55144), (452, 45140), (488, 41810), (565, 36112), (592, 34465), (610, 33448), (740, 27572), (904, 22570), (976, 20905), (1130, 18056), (1220, 16724), (1480, 13786), (1808, 11285), (2257, 9040), (2260, 9028), (2440, 8362), (2960, 6893), (4181, 4880), (4514, 4520)]