21155860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:193

約数の個数: 96

約数和(自身を含む): 52399872

約数和(自身を除く): 31244012

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 37, 44, 46, 55, 74, 92, 110, 113, 115, 148, 185, 220, 226, 230, 253, 370, 407, 452, 460, 506, 565, 740, 814, 851, 1012, 1130, 1243, 1265, 1628, 1702, 2035, 2260, 2486, 2530, 2599, 3404, 4070, 4181, 4255, 4972, 5060, 5198, 6215, 8140, 8362, 8510, 9361, 10396, 12430, 12995, 16724, 17020, 18722, 20905, 24860, 25990, 28589, 37444, 41810, 45991, 46805, 51980, 57178, 83620, 91982, 93610, 96163, 114356, 142945, 183964, 187220, 192326, 229955, 285890, 384652, 459910, 480815, 571780, 919820, 961630, 1057793, 1923260, 2115586, 4231172, 5288965, 10577930, 21155860]

約数ペア:

[(1, 21155860), (2, 10577930), (4, 5288965), (5, 4231172), (10, 2115586), (11, 1923260), (20, 1057793), (22, 961630), (23, 919820), (37, 571780), (44, 480815), (46, 459910), (55, 384652), (74, 285890), (92, 229955), (110, 192326), (113, 187220), (115, 183964), (148, 142945), (185, 114356), (220, 96163), (226, 93610), (230, 91982), (253, 83620), (370, 57178), (407, 51980), (452, 46805), (460, 45991), (506, 41810), (565, 37444), (740, 28589), (814, 25990), (851, 24860), (1012, 20905), (1130, 18722), (1243, 17020), (1265, 16724), (1628, 12995), (1702, 12430), (2035, 10396), (2260, 9361), (2486, 8510), (2530, 8362), (2599, 8140), (3404, 6215), (4070, 5198), (4181, 5060), (4255, 4972)]