21976220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1987}}^1$

素因数の和:2082

約数の個数: 48

約数和(自身を含む): 53437440

約数和(自身を除く): 31461220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1580, 1987, 2212, 2765, 3974, 5530, 7948, 9935, 11060, 13909, 19870, 27818, 39740, 55636, 69545, 139090, 156973, 278180, 313946, 627892, 784865, 1098811, 1569730, 2197622, 3139460, 4395244, 5494055, 10988110, 21976220]

約数ペア:

[(1, 21976220), (2, 10988110), (4, 5494055), (5, 4395244), (7, 3139460), (10, 2197622), (14, 1569730), (20, 1098811), (28, 784865), (35, 627892), (70, 313946), (79, 278180), (140, 156973), (158, 139090), (316, 69545), (395, 55636), (553, 39740), (790, 27818), (1106, 19870), (1580, 13909), (1987, 11060), (2212, 9935), (2765, 7948), (3974, 5530)]