21392460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6991}}^1$

素因数の和:7023

約数の個数: 72

約数和(自身を含む): 68717376

約数和(自身を除く): 47324916

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 6991, 13982, 20973, 27964, 34955, 41946, 62919, 69910, 83892, 104865, 118847, 125838, 139820, 209730, 237694, 251676, 314595, 356541, 419460, 475388, 594235, 629190, 713082, 1069623, 1188470, 1258380, 1426164, 1782705, 2139246, 2376940, 3565410, 4278492, 5348115, 7130820, 10696230, 21392460]

約数ペア:

[(1, 21392460), (2, 10696230), (3, 7130820), (4, 5348115), (5, 4278492), (6, 3565410), (9, 2376940), (10, 2139246), (12, 1782705), (15, 1426164), (17, 1258380), (18, 1188470), (20, 1069623), (30, 713082), (34, 629190), (36, 594235), (45, 475388), (51, 419460), (60, 356541), (68, 314595), (85, 251676), (90, 237694), (102, 209730), (153, 139820), (170, 125838), (180, 118847), (204, 104865), (255, 83892), (306, 69910), (340, 62919), (510, 41946), (612, 34955), (765, 27964), (1020, 20973), (1530, 13982), (3060, 6991)]