21788516

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{79}}^1\times {\mathrm{191}}^1$

素因数の和:312

約数の個数: 36

約数和(自身を含む): 40965120

約数和(自身を除く): 19176604

約数列:

[1, 2, 4, 19, 38, 76, 79, 158, 191, 316, 361, 382, 722, 764, 1444, 1501, 3002, 3629, 6004, 7258, 14516, 15089, 28519, 30178, 57038, 60356, 68951, 114076, 137902, 275804, 286691, 573382, 1146764, 5447129, 10894258, 21788516]

約数ペア:

[(1, 21788516), (2, 10894258), (4, 5447129), (19, 1146764), (38, 573382), (76, 286691), (79, 275804), (158, 137902), (191, 114076), (316, 68951), (361, 60356), (382, 57038), (722, 30178), (764, 28519), (1444, 15089), (1501, 14516), (3002, 7258), (3629, 6004)]