21177320

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{349}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 50274000

約数和(自身を除く): 29096680

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 41, 74, 82, 148, 164, 185, 205, 296, 328, 349, 370, 410, 698, 740, 820, 1396, 1480, 1517, 1640, 1745, 2792, 3034, 3490, 6068, 6980, 7585, 12136, 12913, 13960, 14309, 15170, 25826, 28618, 30340, 51652, 57236, 60680, 64565, 71545, 103304, 114472, 129130, 143090, 258260, 286180, 516520, 529433, 572360, 1058866, 2117732, 2647165, 4235464, 5294330, 10588660, 21177320]

約数ペア:

[(1, 21177320), (2, 10588660), (4, 5294330), (5, 4235464), (8, 2647165), (10, 2117732), (20, 1058866), (37, 572360), (40, 529433), (41, 516520), (74, 286180), (82, 258260), (148, 143090), (164, 129130), (185, 114472), (205, 103304), (296, 71545), (328, 64565), (349, 60680), (370, 57236), (410, 51652), (698, 30340), (740, 28618), (820, 25826), (1396, 15170), (1480, 14309), (1517, 13960), (1640, 12913), (1745, 12136), (2792, 7585), (3034, 6980), (3490, 6068)]