65409920

素因数分解:

$2^7\times 5^1\times {\mathrm{102203}}^1$

素因数の和:102222

約数の個数: 32

約数和(自身を含む): 156372120

約数和(自身を除く): 90962200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 102203, 204406, 408812, 511015, 817624, 1022030, 1635248, 2044060, 3270496, 4088120, 6540992, 8176240, 13081984, 16352480, 32704960, 65409920]

約数ペア:

[(1, 65409920), (2, 32704960), (4, 16352480), (5, 13081984), (8, 8176240), (10, 6540992), (16, 4088120), (20, 3270496), (32, 2044060), (40, 1635248), (64, 1022030), (80, 817624), (128, 511015), (160, 408812), (320, 204406), (640, 102203)]