21351820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{349}}^1$

素因数の和:407

約数の個数: 96

約数和(自身を含む): 56448000

約数和(自身を除く): 35096180

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 23, 28, 35, 38, 46, 70, 76, 92, 95, 115, 133, 140, 161, 190, 230, 266, 322, 349, 380, 437, 460, 532, 644, 665, 698, 805, 874, 1330, 1396, 1610, 1745, 1748, 2185, 2443, 2660, 3059, 3220, 3490, 4370, 4886, 6118, 6631, 6980, 8027, 8740, 9772, 12215, 12236, 13262, 15295, 16054, 24430, 26524, 30590, 32108, 33155, 40135, 46417, 48860, 56189, 61180, 66310, 80270, 92834, 112378, 132620, 152513, 160540, 185668, 224756, 232085, 280945, 305026, 464170, 561890, 610052, 762565, 928340, 1067591, 1123780, 1525130, 2135182, 3050260, 4270364, 5337955, 10675910, 21351820]

約数ペア:

[(1, 21351820), (2, 10675910), (4, 5337955), (5, 4270364), (7, 3050260), (10, 2135182), (14, 1525130), (19, 1123780), (20, 1067591), (23, 928340), (28, 762565), (35, 610052), (38, 561890), (46, 464170), (70, 305026), (76, 280945), (92, 232085), (95, 224756), (115, 185668), (133, 160540), (140, 152513), (161, 132620), (190, 112378), (230, 92834), (266, 80270), (322, 66310), (349, 61180), (380, 56189), (437, 48860), (460, 46417), (532, 40135), (644, 33155), (665, 32108), (698, 30590), (805, 26524), (874, 24430), (1330, 16054), (1396, 15295), (1610, 13262), (1745, 12236), (1748, 12215), (2185, 9772), (2443, 8740), (2660, 8027), (3059, 6980), (3220, 6631), (3490, 6118), (4370, 4886)]