20707820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:207

約数の個数: 96

約数和(自身を含む): 53222400

約数和(自身を除く): 32514580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 59, 70, 92, 109, 115, 118, 140, 161, 218, 230, 236, 295, 322, 413, 436, 460, 545, 590, 644, 763, 805, 826, 1090, 1180, 1357, 1526, 1610, 1652, 2065, 2180, 2507, 2714, 3052, 3220, 3815, 4130, 5014, 5428, 6431, 6785, 7630, 8260, 9499, 10028, 12535, 12862, 13570, 15260, 17549, 18998, 25070, 25724, 27140, 32155, 35098, 37996, 45017, 47495, 50140, 64310, 70196, 87745, 90034, 94990, 128620, 147913, 175490, 180068, 189980, 225085, 295826, 350980, 450170, 591652, 739565, 900340, 1035391, 1479130, 2070782, 2958260, 4141564, 5176955, 10353910, 20707820]

約数ペア:

[(1, 20707820), (2, 10353910), (4, 5176955), (5, 4141564), (7, 2958260), (10, 2070782), (14, 1479130), (20, 1035391), (23, 900340), (28, 739565), (35, 591652), (46, 450170), (59, 350980), (70, 295826), (92, 225085), (109, 189980), (115, 180068), (118, 175490), (140, 147913), (161, 128620), (218, 94990), (230, 90034), (236, 87745), (295, 70196), (322, 64310), (413, 50140), (436, 47495), (460, 45017), (545, 37996), (590, 35098), (644, 32155), (763, 27140), (805, 25724), (826, 25070), (1090, 18998), (1180, 17549), (1357, 15260), (1526, 13570), (1610, 12862), (1652, 12535), (2065, 10028), (2180, 9499), (2507, 8260), (2714, 7630), (3052, 6785), (3220, 6431), (3815, 5428), (4130, 5014)]