20101640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:127

約数の個数: 128

約数和(自身を含む): 53222400

約数和(自身を除く): 33120760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 31, 40, 43, 52, 58, 62, 65, 86, 104, 116, 124, 130, 145, 155, 172, 215, 232, 248, 260, 290, 310, 344, 377, 403, 430, 520, 559, 580, 620, 754, 806, 860, 899, 1118, 1160, 1240, 1247, 1333, 1508, 1612, 1720, 1798, 1885, 2015, 2236, 2494, 2666, 2795, 3016, 3224, 3596, 3770, 4030, 4472, 4495, 4988, 5332, 5590, 6235, 6665, 7192, 7540, 8060, 8990, 9976, 10664, 11180, 11687, 12470, 13330, 15080, 16120, 16211, 17329, 17980, 22360, 23374, 24940, 26660, 32422, 34658, 35960, 38657, 46748, 49880, 53320, 58435, 64844, 69316, 77314, 81055, 86645, 93496, 116870, 129688, 138632, 154628, 162110, 173290, 193285, 233740, 309256, 324220, 346580, 386570, 467480, 502541, 648440, 693160, 773140, 1005082, 1546280, 2010164, 2512705, 4020328, 5025410, 10050820, 20101640]

約数ペア:

[(1, 20101640), (2, 10050820), (4, 5025410), (5, 4020328), (8, 2512705), (10, 2010164), (13, 1546280), (20, 1005082), (26, 773140), (29, 693160), (31, 648440), (40, 502541), (43, 467480), (52, 386570), (58, 346580), (62, 324220), (65, 309256), (86, 233740), (104, 193285), (116, 173290), (124, 162110), (130, 154628), (145, 138632), (155, 129688), (172, 116870), (215, 93496), (232, 86645), (248, 81055), (260, 77314), (290, 69316), (310, 64844), (344, 58435), (377, 53320), (403, 49880), (430, 46748), (520, 38657), (559, 35960), (580, 34658), (620, 32422), (754, 26660), (806, 24940), (860, 23374), (899, 22360), (1118, 17980), (1160, 17329), (1240, 16211), (1247, 16120), (1333, 15080), (1508, 13330), (1612, 12470), (1720, 11687), (1798, 11180), (1885, 10664), (2015, 9976), (2236, 8990), (2494, 8060), (2666, 7540), (2795, 7192), (3016, 6665), (3224, 6235), (3596, 5590), (3770, 5332), (4030, 4988), (4472, 4495)]