21905156760

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{256021}}^1$

素因数の和:256089

約数の個数: 128

約数和(自身を含む): 70784962560

約数和(自身を除く): 48879805800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 31, 40, 46, 60, 62, 69, 92, 93, 115, 120, 124, 138, 155, 184, 186, 230, 248, 276, 310, 345, 372, 460, 465, 552, 620, 690, 713, 744, 920, 930, 1240, 1380, 1426, 1860, 2139, 2760, 2852, 3565, 3720, 4278, 5704, 7130, 8556, 10695, 14260, 17112, 21390, 28520, 42780, 85560, 256021, 512042, 768063, 1024084, 1280105, 1536126, 2048168, 2560210, 3072252, 3840315, 5120420, 5888483, 6144504, 7680630, 7936651, 10240840, 11776966, 15361260, 15873302, 17665449, 23553932, 23809953, 29442415, 30722520, 31746604, 35330898, 39683255, 47107864, 47619906, 58884830, 63493208, 70661796, 79366510, 88327245, 95239812, 117769660, 119049765, 141323592, 158733020, 176654490, 182542973, 190479624, 235539320, 238099530, 317466040, 353308980, 365085946, 476199060, 547628919, 706617960, 730171892, 912714865, 952398120, 1095257838, 1460343784, 1825429730, 2190515676, 2738144595, 3650859460, 4381031352, 5476289190, 7301718920, 10952578380, 21905156760]

約数ペア:

[(1, 21905156760), (2, 10952578380), (3, 7301718920), (4, 5476289190), (5, 4381031352), (6, 3650859460), (8, 2738144595), (10, 2190515676), (12, 1825429730), (15, 1460343784), (20, 1095257838), (23, 952398120), (24, 912714865), (30, 730171892), (31, 706617960), (40, 547628919), (46, 476199060), (60, 365085946), (62, 353308980), (69, 317466040), (92, 238099530), (93, 235539320), (115, 190479624), (120, 182542973), (124, 176654490), (138, 158733020), (155, 141323592), (184, 119049765), (186, 117769660), (230, 95239812), (248, 88327245), (276, 79366510), (310, 70661796), (345, 63493208), (372, 58884830), (460, 47619906), (465, 47107864), (552, 39683255), (620, 35330898), (690, 31746604), (713, 30722520), (744, 29442415), (920, 23809953), (930, 23553932), (1240, 17665449), (1380, 15873302), (1426, 15361260), (1860, 11776966), (2139, 10240840), (2760, 7936651), (2852, 7680630), (3565, 6144504), (3720, 5888483), (4278, 5120420), (5704, 3840315), (7130, 3072252), (8556, 2560210), (10695, 2048168), (14260, 1536126), (17112, 1280105), (21390, 1024084), (28520, 768063), (42780, 512042), (85560, 256021)]