18709988

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:129

約数の個数: 72

約数和(自身を含む): 39325440

約数和(自身を除く): 20615452

約数列:

[1, 2, 4, 11, 22, 29, 31, 43, 44, 58, 62, 86, 116, 121, 124, 172, 242, 319, 341, 473, 484, 638, 682, 899, 946, 1247, 1276, 1333, 1364, 1798, 1892, 2494, 2666, 3509, 3596, 3751, 4988, 5203, 5332, 7018, 7502, 9889, 10406, 13717, 14036, 14663, 15004, 19778, 20812, 27434, 29326, 38657, 39556, 54868, 58652, 77314, 108779, 150887, 154628, 161293, 217558, 301774, 322586, 425227, 435116, 603548, 645172, 850454, 1700908, 4677497, 9354994, 18709988]

約数ペア:

[(1, 18709988), (2, 9354994), (4, 4677497), (11, 1700908), (22, 850454), (29, 645172), (31, 603548), (43, 435116), (44, 425227), (58, 322586), (62, 301774), (86, 217558), (116, 161293), (121, 154628), (124, 150887), (172, 108779), (242, 77314), (319, 58652), (341, 54868), (473, 39556), (484, 38657), (638, 29326), (682, 27434), (899, 20812), (946, 19778), (1247, 15004), (1276, 14663), (1333, 14036), (1364, 13717), (1798, 10406), (1892, 9889), (2494, 7502), (2666, 7018), (3509, 5332), (3596, 5203), (3751, 4988)]