21130928

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{631}}^1$

素因数の和:682

約数の個数: 80

約数和(自身を含む): 52663296

約数和(自身を除く): 31532368

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 23, 26, 28, 46, 52, 56, 91, 92, 104, 112, 161, 182, 184, 208, 299, 322, 364, 368, 598, 631, 644, 728, 1196, 1262, 1288, 1456, 2093, 2392, 2524, 2576, 4186, 4417, 4784, 5048, 8203, 8372, 8834, 10096, 14513, 16406, 16744, 17668, 29026, 32812, 33488, 35336, 57421, 58052, 65624, 70672, 101591, 114842, 116104, 131248, 188669, 203182, 229684, 232208, 377338, 406364, 459368, 754676, 812728, 918736, 1320683, 1509352, 1625456, 2641366, 3018704, 5282732, 10565464, 21130928]

約数ペア:

[(1, 21130928), (2, 10565464), (4, 5282732), (7, 3018704), (8, 2641366), (13, 1625456), (14, 1509352), (16, 1320683), (23, 918736), (26, 812728), (28, 754676), (46, 459368), (52, 406364), (56, 377338), (91, 232208), (92, 229684), (104, 203182), (112, 188669), (161, 131248), (182, 116104), (184, 114842), (208, 101591), (299, 70672), (322, 65624), (364, 58052), (368, 57421), (598, 35336), (631, 33488), (644, 32812), (728, 29026), (1196, 17668), (1262, 16744), (1288, 16406), (1456, 14513), (2093, 10096), (2392, 8834), (2524, 8372), (2576, 8203), (4186, 5048), (4417, 4784)]