19977958

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{587}}^1$

素因数の和:637

約数の個数: 64

約数和(自身を含む): 42674688

約数和(自身を除く): 22696730

約数列:

[1, 2, 7, 11, 13, 14, 17, 22, 26, 34, 77, 91, 119, 143, 154, 182, 187, 221, 238, 286, 374, 442, 587, 1001, 1174, 1309, 1547, 2002, 2431, 2618, 3094, 4109, 4862, 6457, 7631, 8218, 9979, 12914, 15262, 17017, 19958, 34034, 45199, 53417, 69853, 83941, 90398, 106834, 109769, 129727, 139706, 167882, 219538, 259454, 587587, 768383, 908089, 1175174, 1426997, 1536766, 1816178, 2853994, 9988979, 19977958]

約数ペア:

[(1, 19977958), (2, 9988979), (7, 2853994), (11, 1816178), (13, 1536766), (14, 1426997), (17, 1175174), (22, 908089), (26, 768383), (34, 587587), (77, 259454), (91, 219538), (119, 167882), (143, 139706), (154, 129727), (182, 109769), (187, 106834), (221, 90398), (238, 83941), (286, 69853), (374, 53417), (442, 45199), (587, 34034), (1001, 19958), (1174, 17017), (1309, 15262), (1547, 12914), (2002, 9979), (2431, 8218), (2618, 7631), (3094, 6457), (4109, 4862)]