20449988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 20192572

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 71, 116, 142, 191, 284, 377, 382, 754, 764, 923, 1508, 1846, 2059, 2483, 3692, 4118, 4966, 5539, 8236, 9932, 11078, 13561, 22156, 26767, 27122, 53534, 54244, 72007, 107068, 144014, 176293, 288028, 352586, 393269, 705172, 786538, 1573076, 5112497, 10224994, 20449988]

約数ペア:

[(1, 20449988), (2, 10224994), (4, 5112497), (13, 1573076), (26, 786538), (29, 705172), (52, 393269), (58, 352586), (71, 288028), (116, 176293), (142, 144014), (191, 107068), (284, 72007), (377, 54244), (382, 53534), (754, 27122), (764, 26767), (923, 22156), (1508, 13561), (1846, 11078), (2059, 9932), (2483, 8236), (3692, 5539), (4118, 4966)]