21246880

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^2\times {\mathrm{97}}^1$

素因数の和:186

約数の個数: 72

約数和(自身を含む): 52120908

約数和(自身を除く): 30874028

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 74, 80, 97, 148, 160, 185, 194, 296, 370, 388, 485, 592, 740, 776, 970, 1184, 1369, 1480, 1552, 1940, 2738, 2960, 3104, 3589, 3880, 5476, 5920, 6845, 7178, 7760, 10952, 13690, 14356, 15520, 17945, 21904, 27380, 28712, 35890, 43808, 54760, 57424, 71780, 109520, 114848, 132793, 143560, 219040, 265586, 287120, 531172, 574240, 663965, 1062344, 1327930, 2124688, 2655860, 4249376, 5311720, 10623440, 21246880]

約数ペア:

[(1, 21246880), (2, 10623440), (4, 5311720), (5, 4249376), (8, 2655860), (10, 2124688), (16, 1327930), (20, 1062344), (32, 663965), (37, 574240), (40, 531172), (74, 287120), (80, 265586), (97, 219040), (148, 143560), (160, 132793), (185, 114848), (194, 109520), (296, 71780), (370, 57424), (388, 54760), (485, 43808), (592, 35890), (740, 28712), (776, 27380), (970, 21904), (1184, 17945), (1369, 15520), (1480, 14356), (1552, 13690), (1940, 10952), (2738, 7760), (2960, 7178), (3104, 6845), (3589, 5920), (3880, 5476)]