21553965

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 40550400

約数和(自身を除く): 18996435

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 47, 79, 129, 135, 141, 215, 235, 237, 387, 395, 423, 645, 705, 711, 1161, 1185, 1269, 1935, 2021, 2115, 2133, 3397, 3555, 3713, 5805, 6063, 6345, 10105, 10191, 10665, 11139, 16985, 18189, 18565, 30315, 30573, 33417, 50955, 54567, 55695, 90945, 91719, 100251, 152865, 159659, 167085, 272835, 458595, 478977, 501255, 798295, 1436931, 2394885, 4310793, 7184655, 21553965]

約数ペア:

[(1, 21553965), (3, 7184655), (5, 4310793), (9, 2394885), (15, 1436931), (27, 798295), (43, 501255), (45, 478977), (47, 458595), (79, 272835), (129, 167085), (135, 159659), (141, 152865), (215, 100251), (235, 91719), (237, 90945), (387, 55695), (395, 54567), (423, 50955), (645, 33417), (705, 30573), (711, 30315), (1161, 18565), (1185, 18189), (1269, 16985), (1935, 11139), (2021, 10665), (2115, 10191), (2133, 10105), (3397, 6345), (3555, 6063), (3713, 5805)]