1800000040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{347}}^1\times {\mathrm{3163}}^1$

素因数の和:3562

約数の個数: 64

約数和(自身を含む): 4162052160

約数和(自身を除く): 2362052120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 347, 410, 694, 820, 1388, 1640, 1735, 2776, 3163, 3470, 6326, 6940, 12652, 13880, 14227, 15815, 25304, 28454, 31630, 56908, 63260, 71135, 113816, 126520, 129683, 142270, 259366, 284540, 518732, 569080, 648415, 1037464, 1097561, 1296830, 2195122, 2593660, 4390244, 5187320, 5487805, 8780488, 10975610, 21951220, 43902440, 45000001, 90000002, 180000004, 225000005, 360000008, 450000010, 900000020, 1800000040]

約数ペア:

[(1, 1800000040), (2, 900000020), (4, 450000010), (5, 360000008), (8, 225000005), (10, 180000004), (20, 90000002), (40, 45000001), (41, 43902440), (82, 21951220), (164, 10975610), (205, 8780488), (328, 5487805), (347, 5187320), (410, 4390244), (694, 2593660), (820, 2195122), (1388, 1296830), (1640, 1097561), (1735, 1037464), (2776, 648415), (3163, 569080), (3470, 518732), (6326, 284540), (6940, 259366), (12652, 142270), (13880, 129683), (14227, 126520), (15815, 113816), (25304, 71135), (28454, 63260), (31630, 56908)]