20123460

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{15971}}^1$

素因数の和:15993

約数の個数: 72

約数和(自身を含む): 69765696

約数和(自身を除く): 49642236

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 15971, 31942, 47913, 63884, 79855, 95826, 111797, 143739, 159710, 191652, 223594, 239565, 287478, 319420, 335391, 447188, 479130, 558985, 574956, 670782, 718695, 958260, 1006173, 1117970, 1341564, 1437390, 1676955, 2012346, 2235940, 2874780, 3353910, 4024692, 5030865, 6707820, 10061730, 20123460]

約数ペア:

[(1, 20123460), (2, 10061730), (3, 6707820), (4, 5030865), (5, 4024692), (6, 3353910), (7, 2874780), (9, 2235940), (10, 2012346), (12, 1676955), (14, 1437390), (15, 1341564), (18, 1117970), (20, 1006173), (21, 958260), (28, 718695), (30, 670782), (35, 574956), (36, 558985), (42, 479130), (45, 447188), (60, 335391), (63, 319420), (70, 287478), (84, 239565), (90, 223594), (105, 191652), (126, 159710), (140, 143739), (180, 111797), (210, 95826), (252, 79855), (315, 63884), (420, 47913), (630, 31942), (1260, 15971)]