21407680

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{503}}^1$

素因数の和:546

約数の個数: 112

約数和(自身を含む): 61447680

約数和(自身を除く): 40040000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 56, 64, 70, 76, 80, 95, 112, 133, 140, 152, 160, 190, 224, 266, 280, 304, 320, 380, 448, 503, 532, 560, 608, 665, 760, 1006, 1064, 1120, 1216, 1330, 1520, 2012, 2128, 2240, 2515, 2660, 3040, 3521, 4024, 4256, 5030, 5320, 6080, 7042, 8048, 8512, 9557, 10060, 10640, 14084, 16096, 17605, 19114, 20120, 21280, 28168, 32192, 35210, 38228, 40240, 42560, 47785, 56336, 66899, 70420, 76456, 80480, 95570, 112672, 133798, 140840, 152912, 160960, 191140, 225344, 267596, 281680, 305824, 334495, 382280, 535192, 563360, 611648, 668990, 764560, 1070384, 1126720, 1337980, 1529120, 2140768, 2675960, 3058240, 4281536, 5351920, 10703840, 21407680]

約数ペア:

[(1, 21407680), (2, 10703840), (4, 5351920), (5, 4281536), (7, 3058240), (8, 2675960), (10, 2140768), (14, 1529120), (16, 1337980), (19, 1126720), (20, 1070384), (28, 764560), (32, 668990), (35, 611648), (38, 563360), (40, 535192), (56, 382280), (64, 334495), (70, 305824), (76, 281680), (80, 267596), (95, 225344), (112, 191140), (133, 160960), (140, 152912), (152, 140840), (160, 133798), (190, 112672), (224, 95570), (266, 80480), (280, 76456), (304, 70420), (320, 66899), (380, 56336), (448, 47785), (503, 42560), (532, 40240), (560, 38228), (608, 35210), (665, 32192), (760, 28168), (1006, 21280), (1064, 20120), (1120, 19114), (1216, 17605), (1330, 16096), (1520, 14084), (2012, 10640), (2128, 10060), (2240, 9557), (2515, 8512), (2660, 8048), (3040, 7042), (3521, 6080), (4024, 5320), (4256, 5030)]