21216844

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{619}}^1$

素因数の和:694

約数の個数: 48

約数和(自身を含む): 43747200

約数和(自身を除く): 22530356

約数列:

[1, 2, 4, 11, 19, 22, 38, 41, 44, 76, 82, 164, 209, 418, 451, 619, 779, 836, 902, 1238, 1558, 1804, 2476, 3116, 6809, 8569, 11761, 13618, 17138, 23522, 25379, 27236, 34276, 47044, 50758, 101516, 129371, 258742, 279169, 482201, 517484, 558338, 964402, 1116676, 1928804, 5304211, 10608422, 21216844]

約数ペア:

[(1, 21216844), (2, 10608422), (4, 5304211), (11, 1928804), (19, 1116676), (22, 964402), (38, 558338), (41, 517484), (44, 482201), (76, 279169), (82, 258742), (164, 129371), (209, 101516), (418, 50758), (451, 47044), (619, 34276), (779, 27236), (836, 25379), (902, 23522), (1238, 17138), (1558, 13618), (1804, 11761), (2476, 8569), (3116, 6809)]