21000844784

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{401}}^1\times {\mathrm{2333}}^1$

素因数の和:2826

約数の個数: 80

約数和(自身を含む): 43280426304

約数和(自身を除く): 22279581520

約数列:

[1, 2, 4, 8, 16, 23, 46, 61, 92, 122, 184, 244, 368, 401, 488, 802, 976, 1403, 1604, 2333, 2806, 3208, 4666, 5612, 6416, 9223, 9332, 11224, 18446, 18664, 22448, 24461, 36892, 37328, 48922, 53659, 73784, 97844, 107318, 142313, 147568, 195688, 214636, 284626, 391376, 429272, 562603, 569252, 858544, 935533, 1125206, 1138504, 1871066, 2250412, 2277008, 3273199, 3742132, 4500824, 6546398, 7484264, 9001648, 13092796, 14968528, 21517259, 26185592, 43034518, 52371184, 57067513, 86069036, 114135026, 172138072, 228270052, 344276144, 456540104, 913080208, 1312552799, 2625105598, 5250211196, 10500422392, 21000844784]

約数ペア:

[(1, 21000844784), (2, 10500422392), (4, 5250211196), (8, 2625105598), (16, 1312552799), (23, 913080208), (46, 456540104), (61, 344276144), (92, 228270052), (122, 172138072), (184, 114135026), (244, 86069036), (368, 57067513), (401, 52371184), (488, 43034518), (802, 26185592), (976, 21517259), (1403, 14968528), (1604, 13092796), (2333, 9001648), (2806, 7484264), (3208, 6546398), (4666, 4500824), (5612, 3742132), (6416, 3273199), (9223, 2277008), (9332, 2250412), (11224, 1871066), (18446, 1138504), (18664, 1125206), (22448, 935533), (24461, 858544), (36892, 569252), (37328, 562603), (48922, 429272), (53659, 391376), (73784, 284626), (97844, 214636), (107318, 195688), (142313, 147568)]