18991260

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{617}}^1$

素因数の和:657

約数の個数: 120

約数和(自身を含む): 62813520

約数和(自身を除く): 43822260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 81, 90, 95, 108, 114, 135, 162, 171, 180, 190, 228, 270, 285, 324, 342, 380, 405, 513, 540, 570, 617, 684, 810, 855, 1026, 1140, 1234, 1539, 1620, 1710, 1851, 2052, 2468, 2565, 3078, 3085, 3420, 3702, 5130, 5553, 6156, 6170, 7404, 7695, 9255, 10260, 11106, 11723, 12340, 15390, 16659, 18510, 22212, 23446, 27765, 30780, 33318, 35169, 37020, 46892, 49977, 55530, 58615, 66636, 70338, 83295, 99954, 105507, 111060, 117230, 140676, 166590, 175845, 199908, 211014, 234460, 249885, 316521, 333180, 351690, 422028, 499770, 527535, 633042, 703380, 949563, 999540, 1055070, 1266084, 1582605, 1899126, 2110140, 3165210, 3798252, 4747815, 6330420, 9495630, 18991260]

約数ペア:

[(1, 18991260), (2, 9495630), (3, 6330420), (4, 4747815), (5, 3798252), (6, 3165210), (9, 2110140), (10, 1899126), (12, 1582605), (15, 1266084), (18, 1055070), (19, 999540), (20, 949563), (27, 703380), (30, 633042), (36, 527535), (38, 499770), (45, 422028), (54, 351690), (57, 333180), (60, 316521), (76, 249885), (81, 234460), (90, 211014), (95, 199908), (108, 175845), (114, 166590), (135, 140676), (162, 117230), (171, 111060), (180, 105507), (190, 99954), (228, 83295), (270, 70338), (285, 66636), (324, 58615), (342, 55530), (380, 49977), (405, 46892), (513, 37020), (540, 35169), (570, 33318), (617, 30780), (684, 27765), (810, 23446), (855, 22212), (1026, 18510), (1140, 16659), (1234, 15390), (1539, 12340), (1620, 11723), (1710, 11106), (1851, 10260), (2052, 9255), (2468, 7695), (2565, 7404), (3078, 6170), (3085, 6156), (3420, 5553), (3702, 5130)]