21365640

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{271}}^1$

素因数の和:364

約数の個数: 128

約数和(自身を含む): 72460800

約数和(自身を除く): 51095160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 73, 90, 108, 120, 135, 146, 180, 216, 219, 270, 271, 292, 360, 365, 438, 540, 542, 584, 657, 730, 813, 876, 1080, 1084, 1095, 1314, 1355, 1460, 1626, 1752, 1971, 2168, 2190, 2439, 2628, 2710, 2920, 3252, 3285, 3942, 4065, 4380, 4878, 5256, 5420, 6504, 6570, 7317, 7884, 8130, 8760, 9756, 9855, 10840, 12195, 13140, 14634, 15768, 16260, 19512, 19710, 19783, 24390, 26280, 29268, 32520, 36585, 39420, 39566, 48780, 58536, 59349, 73170, 78840, 79132, 97560, 98915, 118698, 146340, 158264, 178047, 197830, 237396, 292680, 296745, 356094, 395660, 474792, 534141, 593490, 712188, 791320, 890235, 1068282, 1186980, 1424376, 1780470, 2136564, 2373960, 2670705, 3560940, 4273128, 5341410, 7121880, 10682820, 21365640]

約数ペア:

[(1, 21365640), (2, 10682820), (3, 7121880), (4, 5341410), (5, 4273128), (6, 3560940), (8, 2670705), (9, 2373960), (10, 2136564), (12, 1780470), (15, 1424376), (18, 1186980), (20, 1068282), (24, 890235), (27, 791320), (30, 712188), (36, 593490), (40, 534141), (45, 474792), (54, 395660), (60, 356094), (72, 296745), (73, 292680), (90, 237396), (108, 197830), (120, 178047), (135, 158264), (146, 146340), (180, 118698), (216, 98915), (219, 97560), (270, 79132), (271, 78840), (292, 73170), (360, 59349), (365, 58536), (438, 48780), (540, 39566), (542, 39420), (584, 36585), (657, 32520), (730, 29268), (813, 26280), (876, 24390), (1080, 19783), (1084, 19710), (1095, 19512), (1314, 16260), (1355, 15768), (1460, 14634), (1626, 13140), (1752, 12195), (1971, 10840), (2168, 9855), (2190, 9756), (2439, 8760), (2628, 8130), (2710, 7884), (2920, 7317), (3252, 6570), (3285, 6504), (3942, 5420), (4065, 5256), (4380, 4878)]