20728157440

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{522383}}^1$

素因数の和:522435

約数の個数: 72

約数和(自身を含む): 51252139008

約数和(自身を除く): 30523981568

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, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 19840, 39680, 522383, 1044766, 2089532, 2611915, 4179064, 5223830, 8358128, 10447660, 16193873, 16716256, 20895320, 32387746, 33432512, 41790640, 64775492, 66865024, 80969365, 83581280, 129550984, 133730048, 161938730, 167162560, 259101968, 323877460, 334325120, 518203936, 647754920, 668650240, 1036407872, 1295509840, 2072815744, 2591019680, 4145631488, 5182039360, 10364078720, 20728157440]

約数ペア:

[(1, 20728157440), (2, 10364078720), (4, 5182039360), (5, 4145631488), (8, 2591019680), (10, 2072815744), (16, 1295509840), (20, 1036407872), (31, 668650240), (32, 647754920), (40, 518203936), (62, 334325120), (64, 323877460), (80, 259101968), (124, 167162560), (128, 161938730), (155, 133730048), (160, 129550984), (248, 83581280), (256, 80969365), (310, 66865024), (320, 64775492), (496, 41790640), (620, 33432512), (640, 32387746), (992, 20895320), (1240, 16716256), (1280, 16193873), (1984, 10447660), (2480, 8358128), (3968, 5223830), (4960, 4179064), (7936, 2611915), (9920, 2089532), (19840, 1044766), (39680, 522383)]