20494720

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1033}}^1$

素因数の和:1083

約数の個数: 64

約数和(自身を含む): 50624640

約数和(自身を除く): 30129920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1033, 1240, 1984, 2066, 2480, 3968, 4132, 4960, 5165, 8264, 9920, 10330, 16528, 19840, 20660, 32023, 33056, 41320, 64046, 66112, 82640, 128092, 132224, 160115, 165280, 256184, 320230, 330560, 512368, 640460, 661120, 1024736, 1280920, 2049472, 2561840, 4098944, 5123680, 10247360, 20494720]

約数ペア:

[(1, 20494720), (2, 10247360), (4, 5123680), (5, 4098944), (8, 2561840), (10, 2049472), (16, 1280920), (20, 1024736), (31, 661120), (32, 640460), (40, 512368), (62, 330560), (64, 320230), (80, 256184), (124, 165280), (128, 160115), (155, 132224), (160, 128092), (248, 82640), (310, 66112), (320, 64046), (496, 41320), (620, 33056), (640, 32023), (992, 20660), (1033, 19840), (1240, 16528), (1984, 10330), (2066, 9920), (2480, 8264), (3968, 5165), (4132, 4960)]