21457980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{503}}^1$

素因数の和:600

約数の個数: 96

約数和(自身を含む): 67737600

約数和(自身を除く): 46279620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 79, 90, 108, 135, 158, 180, 237, 270, 316, 395, 474, 503, 540, 711, 790, 948, 1006, 1185, 1422, 1509, 1580, 2012, 2133, 2370, 2515, 2844, 3018, 3555, 4266, 4527, 4740, 5030, 6036, 7110, 7545, 8532, 9054, 10060, 10665, 13581, 14220, 15090, 18108, 21330, 22635, 27162, 30180, 39737, 42660, 45270, 54324, 67905, 79474, 90540, 119211, 135810, 158948, 198685, 238422, 271620, 357633, 397370, 476844, 596055, 715266, 794740, 1072899, 1192110, 1430532, 1788165, 2145798, 2384220, 3576330, 4291596, 5364495, 7152660, 10728990, 21457980]

約数ペア:

[(1, 21457980), (2, 10728990), (3, 7152660), (4, 5364495), (5, 4291596), (6, 3576330), (9, 2384220), (10, 2145798), (12, 1788165), (15, 1430532), (18, 1192110), (20, 1072899), (27, 794740), (30, 715266), (36, 596055), (45, 476844), (54, 397370), (60, 357633), (79, 271620), (90, 238422), (108, 198685), (135, 158948), (158, 135810), (180, 119211), (237, 90540), (270, 79474), (316, 67905), (395, 54324), (474, 45270), (503, 42660), (540, 39737), (711, 30180), (790, 27162), (948, 22635), (1006, 21330), (1185, 18108), (1422, 15090), (1509, 14220), (1580, 13581), (2012, 10665), (2133, 10060), (2370, 9054), (2515, 8532), (2844, 7545), (3018, 7110), (3555, 6036), (4266, 5030), (4527, 4740)]