19910520

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{7901}}^1$

素因数の和:7925

約数の個数: 96

約数和(自身を含む): 73962720

約数和(自身を除く): 54052200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 84, 90, 105, 120, 126, 140, 168, 180, 210, 252, 280, 315, 360, 420, 504, 630, 840, 1260, 2520, 7901, 15802, 23703, 31604, 39505, 47406, 55307, 63208, 71109, 79010, 94812, 110614, 118515, 142218, 158020, 165921, 189624, 221228, 237030, 276535, 284436, 316040, 331842, 355545, 442456, 474060, 497763, 553070, 568872, 663684, 711090, 829605, 948120, 995526, 1106140, 1327368, 1422180, 1659210, 1991052, 2212280, 2488815, 2844360, 3318420, 3982104, 4977630, 6636840, 9955260, 19910520]

約数ペア:

[(1, 19910520), (2, 9955260), (3, 6636840), (4, 4977630), (5, 3982104), (6, 3318420), (7, 2844360), (8, 2488815), (9, 2212280), (10, 1991052), (12, 1659210), (14, 1422180), (15, 1327368), (18, 1106140), (20, 995526), (21, 948120), (24, 829605), (28, 711090), (30, 663684), (35, 568872), (36, 553070), (40, 497763), (42, 474060), (45, 442456), (56, 355545), (60, 331842), (63, 316040), (70, 284436), (72, 276535), (84, 237030), (90, 221228), (105, 189624), (120, 165921), (126, 158020), (140, 142218), (168, 118515), (180, 110614), (210, 94812), (252, 79010), (280, 71109), (315, 63208), (360, 55307), (420, 47406), (504, 39505), (630, 31604), (840, 23703), (1260, 15802), (2520, 7901)]