19939220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1951}}^1$

素因数の和:2040

約数の個数: 48

約数和(自身を含む): 48534528

約数和(自身を除く): 28595308

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 292, 365, 511, 730, 1022, 1460, 1951, 2044, 2555, 3902, 5110, 7804, 9755, 10220, 13657, 19510, 27314, 39020, 54628, 68285, 136570, 142423, 273140, 284846, 569692, 712115, 996961, 1424230, 1993922, 2848460, 3987844, 4984805, 9969610, 19939220]

約数ペア:

[(1, 19939220), (2, 9969610), (4, 4984805), (5, 3987844), (7, 2848460), (10, 1993922), (14, 1424230), (20, 996961), (28, 712115), (35, 569692), (70, 284846), (73, 273140), (140, 142423), (146, 136570), (292, 68285), (365, 54628), (511, 39020), (730, 27314), (1022, 19510), (1460, 13657), (1951, 10220), (2044, 9755), (2555, 7804), (3902, 5110)]