21003180484

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{20479}}^1$

素因数の和:20681

約数の個数: 72

約数和(自身を含む): 43777556480

約数和(自身を除く): 22774375996

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 121, 143, 163, 242, 286, 326, 484, 572, 652, 1573, 1793, 2119, 3146, 3586, 4238, 6292, 7172, 8476, 19723, 20479, 23309, 39446, 40958, 46618, 78892, 81916, 93236, 225269, 256399, 266227, 450538, 512798, 532454, 901076, 1025596, 1064908, 2477959, 2928497, 3338077, 4955918, 5856994, 6676154, 9911836, 11713988, 13352308, 32213467, 36718847, 43395001, 64426934, 73437694, 86790002, 128853868, 146875388, 173580004, 403907317, 477345011, 807814634, 954690022, 1615629268, 1909380044, 5250795121, 10501590242, 21003180484]

約数ペア:

[(1, 21003180484), (2, 10501590242), (4, 5250795121), (11, 1909380044), (13, 1615629268), (22, 954690022), (26, 807814634), (44, 477345011), (52, 403907317), (121, 173580004), (143, 146875388), (163, 128853868), (242, 86790002), (286, 73437694), (326, 64426934), (484, 43395001), (572, 36718847), (652, 32213467), (1573, 13352308), (1793, 11713988), (2119, 9911836), (3146, 6676154), (3586, 5856994), (4238, 4955918), (6292, 3338077), (7172, 2928497), (8476, 2477959), (19723, 1064908), (20479, 1025596), (23309, 901076), (39446, 532454), (40958, 512798), (46618, 450538), (78892, 266227), (81916, 256399), (93236, 225269)]