20055140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4621}}^1$

素因数の和:4668

約数の個数: 48

約数和(自身を含む): 49695744

約数和(自身を除く): 29640604

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4621, 9242, 18484, 23105, 32347, 46210, 64694, 92420, 129388, 143251, 161735, 286502, 323470, 573004, 646940, 716255, 1002757, 1432510, 2005514, 2865020, 4011028, 5013785, 10027570, 20055140]

約数ペア:

[(1, 20055140), (2, 10027570), (4, 5013785), (5, 4011028), (7, 2865020), (10, 2005514), (14, 1432510), (20, 1002757), (28, 716255), (31, 646940), (35, 573004), (62, 323470), (70, 286502), (124, 161735), (140, 143251), (155, 129388), (217, 92420), (310, 64694), (434, 46210), (620, 32347), (868, 23105), (1085, 18484), (2170, 9242), (4340, 4621)]