20445140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{311}}^1$

素因数の和:512

約数の個数: 48

約数和(自身を含む): 45601920

約数和(自身を除く): 25156780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 173, 190, 311, 346, 380, 622, 692, 865, 1244, 1555, 1730, 3110, 3287, 3460, 5909, 6220, 6574, 11818, 13148, 16435, 23636, 29545, 32870, 53803, 59090, 65740, 107606, 118180, 215212, 269015, 538030, 1022257, 1076060, 2044514, 4089028, 5111285, 10222570, 20445140]

約数ペア:

[(1, 20445140), (2, 10222570), (4, 5111285), (5, 4089028), (10, 2044514), (19, 1076060), (20, 1022257), (38, 538030), (76, 269015), (95, 215212), (173, 118180), (190, 107606), (311, 65740), (346, 59090), (380, 53803), (622, 32870), (692, 29545), (865, 23636), (1244, 16435), (1555, 13148), (1730, 11818), (3110, 6574), (3287, 6220), (3460, 5909)]