21290904

素因数分解:

$2^3\times 3^3\times {\mathrm{241}}^1\times {\mathrm{409}}^1$

素因数の和:665

約数の個数: 64

約数和(自身を含む): 59532000

約数和(自身を除く): 38241096

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 216, 241, 409, 482, 723, 818, 964, 1227, 1446, 1636, 1928, 2169, 2454, 2892, 3272, 3681, 4338, 4908, 5784, 6507, 7362, 8676, 9816, 11043, 13014, 14724, 17352, 22086, 26028, 29448, 44172, 52056, 88344, 98569, 197138, 295707, 394276, 591414, 788552, 887121, 1182828, 1774242, 2365656, 2661363, 3548484, 5322726, 7096968, 10645452, 21290904]

約数ペア:

[(1, 21290904), (2, 10645452), (3, 7096968), (4, 5322726), (6, 3548484), (8, 2661363), (9, 2365656), (12, 1774242), (18, 1182828), (24, 887121), (27, 788552), (36, 591414), (54, 394276), (72, 295707), (108, 197138), (216, 98569), (241, 88344), (409, 52056), (482, 44172), (723, 29448), (818, 26028), (964, 22086), (1227, 17352), (1446, 14724), (1636, 13014), (1928, 11043), (2169, 9816), (2454, 8676), (2892, 7362), (3272, 6507), (3681, 5784), (4338, 4908)]