21103560

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 144

約数和(自身を含む): 72032220

約数和(自身を除く): 50928660

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 31, 36, 40, 45, 60, 61, 62, 72, 90, 93, 120, 122, 124, 155, 180, 183, 186, 244, 248, 279, 305, 310, 360, 366, 372, 465, 488, 549, 558, 610, 620, 732, 744, 915, 930, 961, 1098, 1116, 1220, 1240, 1395, 1464, 1830, 1860, 1891, 1922, 2196, 2232, 2440, 2745, 2790, 2883, 3660, 3720, 3782, 3844, 4392, 4805, 5490, 5580, 5673, 5766, 7320, 7564, 7688, 8649, 9455, 9610, 10980, 11160, 11346, 11532, 14415, 15128, 17019, 17298, 18910, 19220, 21960, 22692, 23064, 28365, 28830, 34038, 34596, 37820, 38440, 43245, 45384, 56730, 57660, 58621, 68076, 69192, 75640, 85095, 86490, 113460, 115320, 117242, 136152, 170190, 172980, 175863, 226920, 234484, 293105, 340380, 345960, 351726, 468968, 527589, 586210, 680760, 703452, 879315, 1055178, 1172420, 1406904, 1758630, 2110356, 2344840, 2637945, 3517260, 4220712, 5275890, 7034520, 10551780, 21103560]

約数ペア:

[(1, 21103560), (2, 10551780), (3, 7034520), (4, 5275890), (5, 4220712), (6, 3517260), (8, 2637945), (9, 2344840), (10, 2110356), (12, 1758630), (15, 1406904), (18, 1172420), (20, 1055178), (24, 879315), (30, 703452), (31, 680760), (36, 586210), (40, 527589), (45, 468968), (60, 351726), (61, 345960), (62, 340380), (72, 293105), (90, 234484), (93, 226920), (120, 175863), (122, 172980), (124, 170190), (155, 136152), (180, 117242), (183, 115320), (186, 113460), (244, 86490), (248, 85095), (279, 75640), (305, 69192), (310, 68076), (360, 58621), (366, 57660), (372, 56730), (465, 45384), (488, 43245), (549, 38440), (558, 37820), (610, 34596), (620, 34038), (732, 28830), (744, 28365), (915, 23064), (930, 22692), (961, 21960), (1098, 19220), (1116, 18910), (1220, 17298), (1240, 17019), (1395, 15128), (1464, 14415), (1830, 11532), (1860, 11346), (1891, 11160), (1922, 10980), (2196, 9610), (2232, 9455), (2440, 8649), (2745, 7688), (2790, 7564), (2883, 7320), (3660, 5766), (3720, 5673), (3782, 5580), (3844, 5490), (4392, 4805)]