19900755

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{21059}}^1$

素因数の和:21080

約数の個数: 32

約数和(自身を含む): 40435200

約数和(自身を除く): 20534445

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 21059, 63177, 105295, 147413, 189531, 315885, 442239, 568593, 737065, 947655, 1326717, 2211195, 2842965, 3980151, 6633585, 19900755]

約数ペア:

[(1, 19900755), (3, 6633585), (5, 3980151), (7, 2842965), (9, 2211195), (15, 1326717), (21, 947655), (27, 737065), (35, 568593), (45, 442239), (63, 315885), (105, 189531), (135, 147413), (189, 105295), (315, 63177), (945, 21059)]