21150591

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:180

約数の個数: 64

約数和(自身を含む): 38092800

約数和(自身を除く): 16942209

約数列:

[1, 3, 7, 11, 19, 21, 33, 57, 61, 77, 79, 133, 183, 209, 231, 237, 399, 427, 553, 627, 671, 869, 1159, 1281, 1463, 1501, 1659, 2013, 2607, 3477, 4389, 4503, 4697, 4819, 6083, 8113, 10507, 12749, 14091, 14457, 16511, 18249, 24339, 31521, 33733, 38247, 49533, 53009, 89243, 91561, 101199, 115577, 159027, 267729, 274683, 346731, 371063, 640927, 1007171, 1113189, 1922781, 3021513, 7050197, 21150591]

約数ペア:

[(1, 21150591), (3, 7050197), (7, 3021513), (11, 1922781), (19, 1113189), (21, 1007171), (33, 640927), (57, 371063), (61, 346731), (77, 274683), (79, 267729), (133, 159027), (183, 115577), (209, 101199), (231, 91561), (237, 89243), (399, 53009), (427, 49533), (553, 38247), (627, 33733), (671, 31521), (869, 24339), (1159, 18249), (1281, 16511), (1463, 14457), (1501, 14091), (1659, 12749), (2013, 10507), (2607, 8113), (3477, 6083), (4389, 4819), (4503, 4697)]