20990190

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{503}}^1$

素因数の和:633

約数の個数: 64

約数和(自身を含む): 54867456

約数和(自身を除く): 33877266

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 107, 130, 195, 214, 321, 390, 503, 535, 642, 1006, 1070, 1391, 1509, 1605, 2515, 2782, 3018, 3210, 4173, 5030, 6539, 6955, 7545, 8346, 13078, 13910, 15090, 19617, 20865, 32695, 39234, 41730, 53821, 65390, 98085, 107642, 161463, 196170, 269105, 322926, 538210, 699673, 807315, 1399346, 1614630, 2099019, 3498365, 4198038, 6996730, 10495095, 20990190]

約数ペア:

[(1, 20990190), (2, 10495095), (3, 6996730), (5, 4198038), (6, 3498365), (10, 2099019), (13, 1614630), (15, 1399346), (26, 807315), (30, 699673), (39, 538210), (65, 322926), (78, 269105), (107, 196170), (130, 161463), (195, 107642), (214, 98085), (321, 65390), (390, 53821), (503, 41730), (535, 39234), (642, 32695), (1006, 20865), (1070, 19617), (1391, 15090), (1509, 13910), (1605, 13078), (2515, 8346), (2782, 7545), (3018, 6955), (3210, 6539), (4173, 5030)]