21231720

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{6553}}^1$

素因数の和:6576

約数の個数: 80

約数和(自身を含む): 71373060

約数和(自身を除く): 50141340

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 270, 324, 360, 405, 540, 648, 810, 1080, 1620, 3240, 6553, 13106, 19659, 26212, 32765, 39318, 52424, 58977, 65530, 78636, 98295, 117954, 131060, 157272, 176931, 196590, 235908, 262120, 294885, 353862, 393180, 471816, 530793, 589770, 707724, 786360, 884655, 1061586, 1179540, 1415448, 1769310, 2123172, 2359080, 2653965, 3538620, 4246344, 5307930, 7077240, 10615860, 21231720]

約数ペア:

[(1, 21231720), (2, 10615860), (3, 7077240), (4, 5307930), (5, 4246344), (6, 3538620), (8, 2653965), (9, 2359080), (10, 2123172), (12, 1769310), (15, 1415448), (18, 1179540), (20, 1061586), (24, 884655), (27, 786360), (30, 707724), (36, 589770), (40, 530793), (45, 471816), (54, 393180), (60, 353862), (72, 294885), (81, 262120), (90, 235908), (108, 196590), (120, 176931), (135, 157272), (162, 131060), (180, 117954), (216, 98295), (270, 78636), (324, 65530), (360, 58977), (405, 52424), (540, 39318), (648, 32765), (810, 26212), (1080, 19659), (1620, 13106), (3240, 6553)]