21585920

素因数分解:

$2^{13}\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:79

約数の個数: 112

約数和(自身を含む): 56619648

約数和(自身を除く): 35033728

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 64, 68, 80, 85, 124, 128, 136, 155, 160, 170, 248, 256, 272, 310, 320, 340, 496, 512, 527, 544, 620, 640, 680, 992, 1024, 1054, 1088, 1240, 1280, 1360, 1984, 2048, 2108, 2176, 2480, 2560, 2635, 2720, 3968, 4096, 4216, 4352, 4960, 5120, 5270, 5440, 7936, 8192, 8432, 8704, 9920, 10240, 10540, 10880, 15872, 16864, 17408, 19840, 20480, 21080, 21760, 31744, 33728, 34816, 39680, 40960, 42160, 43520, 63488, 67456, 69632, 79360, 84320, 87040, 126976, 134912, 139264, 158720, 168640, 174080, 253952, 269824, 317440, 337280, 348160, 539648, 634880, 674560, 696320, 1079296, 1269760, 1349120, 2158592, 2698240, 4317184, 5396480, 10792960, 21585920]

約数ペア:

[(1, 21585920), (2, 10792960), (4, 5396480), (5, 4317184), (8, 2698240), (10, 2158592), (16, 1349120), (17, 1269760), (20, 1079296), (31, 696320), (32, 674560), (34, 634880), (40, 539648), (62, 348160), (64, 337280), (68, 317440), (80, 269824), (85, 253952), (124, 174080), (128, 168640), (136, 158720), (155, 139264), (160, 134912), (170, 126976), (248, 87040), (256, 84320), (272, 79360), (310, 69632), (320, 67456), (340, 63488), (496, 43520), (512, 42160), (527, 40960), (544, 39680), (620, 34816), (640, 33728), (680, 31744), (992, 21760), (1024, 21080), (1054, 20480), (1088, 19840), (1240, 17408), (1280, 16864), (1360, 15872), (1984, 10880), (2048, 10540), (2108, 10240), (2176, 9920), (2480, 8704), (2560, 8432), (2635, 8192), (2720, 7936), (3968, 5440), (4096, 5270), (4216, 5120), (4352, 4960)]