20987538

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{401}}^1$

素因数の和:491

約数の個数: 64

約数和(自身を含む): 50246784

約数和(自身を除く): 29259246

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 61, 66, 78, 122, 143, 183, 286, 366, 401, 429, 671, 793, 802, 858, 1203, 1342, 1586, 2013, 2379, 2406, 4026, 4411, 4758, 5213, 8723, 8822, 10426, 13233, 15639, 17446, 24461, 26169, 26466, 31278, 48922, 52338, 57343, 73383, 114686, 146766, 172029, 269071, 317993, 344058, 538142, 635986, 807213, 953979, 1614426, 1907958, 3497923, 6995846, 10493769, 20987538]

約数ペア:

[(1, 20987538), (2, 10493769), (3, 6995846), (6, 3497923), (11, 1907958), (13, 1614426), (22, 953979), (26, 807213), (33, 635986), (39, 538142), (61, 344058), (66, 317993), (78, 269071), (122, 172029), (143, 146766), (183, 114686), (286, 73383), (366, 57343), (401, 52338), (429, 48922), (671, 31278), (793, 26466), (802, 26169), (858, 24461), (1203, 17446), (1342, 15639), (1586, 13233), (2013, 10426), (2379, 8822), (2406, 8723), (4026, 5213), (4411, 4758)]