19806904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{659}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 42550200

約数和(自身を除く): 22743296

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 104, 136, 221, 289, 442, 578, 659, 884, 1156, 1318, 1768, 2312, 2636, 3757, 5272, 7514, 8567, 11203, 15028, 17134, 22406, 30056, 34268, 44812, 68536, 89624, 145639, 190451, 291278, 380902, 582556, 761804, 1165112, 1523608, 2475863, 4951726, 9903452, 19806904]

約数ペア:

[(1, 19806904), (2, 9903452), (4, 4951726), (8, 2475863), (13, 1523608), (17, 1165112), (26, 761804), (34, 582556), (52, 380902), (68, 291278), (104, 190451), (136, 145639), (221, 89624), (289, 68536), (442, 44812), (578, 34268), (659, 30056), (884, 22406), (1156, 17134), (1318, 15028), (1768, 11203), (2312, 8567), (2636, 7514), (3757, 5272)]