21296320

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1091}}^1$

素因数の和:1169

約数の個数: 56

約数和(自身を含む): 51590448

約数和(自身を除く): 30294128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1091, 1220, 1952, 2182, 2440, 3904, 4364, 4880, 5455, 8728, 9760, 10910, 17456, 19520, 21820, 34912, 43640, 66551, 69824, 87280, 133102, 174560, 266204, 332755, 349120, 532408, 665510, 1064816, 1331020, 2129632, 2662040, 4259264, 5324080, 10648160, 21296320]

約数ペア:

[(1, 21296320), (2, 10648160), (4, 5324080), (5, 4259264), (8, 2662040), (10, 2129632), (16, 1331020), (20, 1064816), (32, 665510), (40, 532408), (61, 349120), (64, 332755), (80, 266204), (122, 174560), (160, 133102), (244, 87280), (305, 69824), (320, 66551), (488, 43640), (610, 34912), (976, 21820), (1091, 19520), (1220, 17456), (1952, 10910), (2182, 9760), (2440, 8728), (3904, 5455), (4364, 4880)]