21815703

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{683}}^1$

素因数の和:725

約数の個数: 48

約数和(自身を含む): 40055040

約数和(自身を除く): 18239337

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 169, 189, 273, 351, 507, 683, 819, 1183, 1521, 2049, 2457, 3549, 4563, 4781, 6147, 8879, 10647, 14343, 18441, 26637, 31941, 43029, 62153, 79911, 115427, 129087, 186459, 239733, 346281, 559377, 807989, 1038843, 1678131, 2423967, 3116529, 7271901, 21815703]

約数ペア:

[(1, 21815703), (3, 7271901), (7, 3116529), (9, 2423967), (13, 1678131), (21, 1038843), (27, 807989), (39, 559377), (63, 346281), (91, 239733), (117, 186459), (169, 129087), (189, 115427), (273, 79911), (351, 62153), (507, 43029), (683, 31941), (819, 26637), (1183, 18441), (1521, 14343), (2049, 10647), (2457, 8879), (3549, 6147), (4563, 4781)]