21657872

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{373}}^1$

素因数の和:591

約数の個数: 40

約数和(自身を含む): 44520960

約数和(自身を除く): 22863088

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 191, 304, 373, 382, 746, 764, 1492, 1528, 2984, 3056, 3629, 5968, 7087, 7258, 14174, 14516, 28348, 29032, 56696, 58064, 71243, 113392, 142486, 284972, 569944, 1139888, 1353617, 2707234, 5414468, 10828936, 21657872]

約数ペア:

[(1, 21657872), (2, 10828936), (4, 5414468), (8, 2707234), (16, 1353617), (19, 1139888), (38, 569944), (76, 284972), (152, 142486), (191, 113392), (304, 71243), (373, 58064), (382, 56696), (746, 29032), (764, 28348), (1492, 14516), (1528, 14174), (2984, 7258), (3056, 7087), (3629, 5968)]