19917810

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:125

約数の個数: 144

約数和(自身を含む): 59754240

約数和(自身を除く): 39836430

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 31, 33, 45, 55, 59, 62, 66, 90, 93, 99, 110, 118, 121, 155, 165, 177, 186, 198, 242, 279, 295, 310, 330, 341, 354, 363, 465, 495, 531, 558, 590, 605, 649, 682, 726, 885, 930, 990, 1023, 1062, 1089, 1210, 1298, 1395, 1705, 1770, 1815, 1829, 1947, 2046, 2178, 2655, 2790, 3069, 3245, 3410, 3630, 3658, 3751, 3894, 5115, 5310, 5445, 5487, 5841, 6138, 6490, 7139, 7502, 9145, 9735, 10230, 10890, 10974, 11253, 11682, 14278, 15345, 16461, 18290, 18755, 19470, 20119, 21417, 22506, 27435, 29205, 30690, 32922, 33759, 35695, 37510, 40238, 42834, 54870, 56265, 58410, 60357, 64251, 67518, 71390, 82305, 100595, 107085, 112530, 120714, 128502, 164610, 168795, 181071, 201190, 214170, 221309, 301785, 321255, 337590, 362142, 442618, 603570, 642510, 663927, 905355, 1106545, 1327854, 1810710, 1991781, 2213090, 3319635, 3983562, 6639270, 9958905, 19917810]

約数ペア:

[(1, 19917810), (2, 9958905), (3, 6639270), (5, 3983562), (6, 3319635), (9, 2213090), (10, 1991781), (11, 1810710), (15, 1327854), (18, 1106545), (22, 905355), (30, 663927), (31, 642510), (33, 603570), (45, 442618), (55, 362142), (59, 337590), (62, 321255), (66, 301785), (90, 221309), (93, 214170), (99, 201190), (110, 181071), (118, 168795), (121, 164610), (155, 128502), (165, 120714), (177, 112530), (186, 107085), (198, 100595), (242, 82305), (279, 71390), (295, 67518), (310, 64251), (330, 60357), (341, 58410), (354, 56265), (363, 54870), (465, 42834), (495, 40238), (531, 37510), (558, 35695), (590, 33759), (605, 32922), (649, 30690), (682, 29205), (726, 27435), (885, 22506), (930, 21417), (990, 20119), (1023, 19470), (1062, 18755), (1089, 18290), (1210, 16461), (1298, 15345), (1395, 14278), (1705, 11682), (1770, 11253), (1815, 10974), (1829, 10890), (1947, 10230), (2046, 9735), (2178, 9145), (2655, 7502), (2790, 7139), (3069, 6490), (3245, 6138), (3410, 5841), (3630, 5487), (3658, 5445), (3751, 5310), (3894, 5115)]