19959040

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:555

約数の個数: 72

約数和(自身を含む): 49448448

約数和(自身を除く): 29489408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 503, 620, 640, 992, 1006, 1240, 1280, 1984, 2012, 2480, 2515, 3968, 4024, 4960, 5030, 7936, 8048, 9920, 10060, 15593, 16096, 19840, 20120, 31186, 32192, 39680, 40240, 62372, 64384, 77965, 80480, 124744, 128768, 155930, 160960, 249488, 311860, 321920, 498976, 623720, 643840, 997952, 1247440, 1995904, 2494880, 3991808, 4989760, 9979520, 19959040]

約数ペア:

[(1, 19959040), (2, 9979520), (4, 4989760), (5, 3991808), (8, 2494880), (10, 1995904), (16, 1247440), (20, 997952), (31, 643840), (32, 623720), (40, 498976), (62, 321920), (64, 311860), (80, 249488), (124, 160960), (128, 155930), (155, 128768), (160, 124744), (248, 80480), (256, 77965), (310, 64384), (320, 62372), (496, 40240), (503, 39680), (620, 32192), (640, 31186), (992, 20120), (1006, 19840), (1240, 16096), (1280, 15593), (1984, 10060), (2012, 9920), (2480, 8048), (2515, 7936), (3968, 5030), (4024, 4960)]