19966804

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{521}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 41743296

約数和(自身を除く): 21776492

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 67, 134, 143, 268, 286, 521, 572, 737, 871, 1042, 1474, 1742, 2084, 2948, 3484, 5731, 6773, 9581, 11462, 13546, 19162, 22924, 27092, 34907, 38324, 69814, 74503, 139628, 149006, 298012, 383977, 453791, 767954, 907582, 1535908, 1815164, 4991701, 9983402, 19966804]

約数ペア:

[(1, 19966804), (2, 9983402), (4, 4991701), (11, 1815164), (13, 1535908), (22, 907582), (26, 767954), (44, 453791), (52, 383977), (67, 298012), (134, 149006), (143, 139628), (268, 74503), (286, 69814), (521, 38324), (572, 34907), (737, 27092), (871, 22924), (1042, 19162), (1474, 13546), (1742, 11462), (2084, 9581), (2948, 6773), (3484, 5731)]