21249928

素因数分解:

$2^3\times 7^2\times {\mathrm{151}}^1\times {\mathrm{359}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 46785600

約数和(自身を除く): 25535672

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 151, 196, 302, 359, 392, 604, 718, 1057, 1208, 1436, 2114, 2513, 2872, 4228, 5026, 7399, 8456, 10052, 14798, 17591, 20104, 29596, 35182, 54209, 59192, 70364, 108418, 140728, 216836, 379463, 433672, 758926, 1517852, 2656241, 3035704, 5312482, 10624964, 21249928]

約数ペア:

[(1, 21249928), (2, 10624964), (4, 5312482), (7, 3035704), (8, 2656241), (14, 1517852), (28, 758926), (49, 433672), (56, 379463), (98, 216836), (151, 140728), (196, 108418), (302, 70364), (359, 59192), (392, 54209), (604, 35182), (718, 29596), (1057, 20104), (1208, 17591), (1436, 14798), (2114, 10052), (2513, 8456), (2872, 7399), (4228, 5026)]