9903920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 25310880

約数和(自身を除く): 15406960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 107, 130, 178, 208, 214, 260, 356, 428, 445, 520, 535, 712, 856, 890, 1040, 1070, 1157, 1391, 1424, 1712, 1780, 2140, 2314, 2782, 3560, 4280, 4628, 5564, 5785, 6955, 7120, 8560, 9256, 9523, 11128, 11570, 13910, 18512, 19046, 22256, 23140, 27820, 38092, 46280, 47615, 55640, 76184, 92560, 95230, 111280, 123799, 152368, 190460, 247598, 380920, 495196, 618995, 761840, 990392, 1237990, 1980784, 2475980, 4951960, 9903920]

約数ペア:

[(1, 9903920), (2, 4951960), (4, 2475980), (5, 1980784), (8, 1237990), (10, 990392), (13, 761840), (16, 618995), (20, 495196), (26, 380920), (40, 247598), (52, 190460), (65, 152368), (80, 123799), (89, 111280), (104, 95230), (107, 92560), (130, 76184), (178, 55640), (208, 47615), (214, 46280), (260, 38092), (356, 27820), (428, 23140), (445, 22256), (520, 19046), (535, 18512), (712, 13910), (856, 11570), (890, 11128), (1040, 9523), (1070, 9256), (1157, 8560), (1391, 7120), (1424, 6955), (1712, 5785), (1780, 5564), (2140, 4628), (2314, 4280), (2782, 3560)]