81319420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{491}}^1$

素因数の和:540

約数の個数: 108

約数和(自身を含む): 215546184

約数和(自身を除く): 134226764

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 169, 182, 196, 245, 260, 338, 364, 455, 490, 491, 637, 676, 845, 910, 980, 982, 1183, 1274, 1690, 1820, 1964, 2366, 2455, 2548, 3185, 3380, 3437, 4732, 4910, 5915, 6370, 6383, 6874, 8281, 9820, 11830, 12740, 12766, 13748, 16562, 17185, 23660, 24059, 25532, 31915, 33124, 34370, 41405, 44681, 48118, 63830, 68740, 82810, 82979, 89362, 96236, 120295, 127660, 165620, 165958, 178724, 223405, 240590, 312767, 331916, 414895, 446810, 481180, 580853, 625534, 829790, 893620, 1161706, 1251068, 1563835, 1659580, 2323412, 2904265, 3127670, 4065971, 5808530, 6255340, 8131942, 11617060, 16263884, 20329855, 40659710, 81319420]

約数ペア:

[(1, 81319420), (2, 40659710), (4, 20329855), (5, 16263884), (7, 11617060), (10, 8131942), (13, 6255340), (14, 5808530), (20, 4065971), (26, 3127670), (28, 2904265), (35, 2323412), (49, 1659580), (52, 1563835), (65, 1251068), (70, 1161706), (91, 893620), (98, 829790), (130, 625534), (140, 580853), (169, 481180), (182, 446810), (196, 414895), (245, 331916), (260, 312767), (338, 240590), (364, 223405), (455, 178724), (490, 165958), (491, 165620), (637, 127660), (676, 120295), (845, 96236), (910, 89362), (980, 82979), (982, 82810), (1183, 68740), (1274, 63830), (1690, 48118), (1820, 44681), (1964, 41405), (2366, 34370), (2455, 33124), (2548, 31915), (3185, 25532), (3380, 24059), (3437, 23660), (4732, 17185), (4910, 16562), (5915, 13748), (6370, 12766), (6383, 12740), (6874, 11830), (8281, 9820)]