20890080

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:273

約数の個数: 144

約数和(自身を含む): 72530640

約数和(自身を除く): 51640560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 89, 90, 96, 120, 144, 160, 163, 178, 180, 240, 267, 288, 326, 356, 360, 445, 480, 489, 534, 652, 712, 720, 801, 815, 890, 978, 1068, 1304, 1335, 1424, 1440, 1467, 1602, 1630, 1780, 1956, 2136, 2445, 2608, 2670, 2848, 2934, 3204, 3260, 3560, 3912, 4005, 4272, 4890, 5216, 5340, 5868, 6408, 6520, 7120, 7335, 7824, 8010, 8544, 9780, 10680, 11736, 12816, 13040, 14240, 14507, 14670, 15648, 16020, 19560, 21360, 23472, 25632, 26080, 29014, 29340, 32040, 39120, 42720, 43521, 46944, 58028, 58680, 64080, 72535, 78240, 87042, 116056, 117360, 128160, 130563, 145070, 174084, 217605, 232112, 234720, 261126, 290140, 348168, 435210, 464224, 522252, 580280, 652815, 696336, 870420, 1044504, 1160560, 1305630, 1392672, 1740840, 2089008, 2321120, 2611260, 3481680, 4178016, 5222520, 6963360, 10445040, 20890080]

約数ペア:

[(1, 20890080), (2, 10445040), (3, 6963360), (4, 5222520), (5, 4178016), (6, 3481680), (8, 2611260), (9, 2321120), (10, 2089008), (12, 1740840), (15, 1392672), (16, 1305630), (18, 1160560), (20, 1044504), (24, 870420), (30, 696336), (32, 652815), (36, 580280), (40, 522252), (45, 464224), (48, 435210), (60, 348168), (72, 290140), (80, 261126), (89, 234720), (90, 232112), (96, 217605), (120, 174084), (144, 145070), (160, 130563), (163, 128160), (178, 117360), (180, 116056), (240, 87042), (267, 78240), (288, 72535), (326, 64080), (356, 58680), (360, 58028), (445, 46944), (480, 43521), (489, 42720), (534, 39120), (652, 32040), (712, 29340), (720, 29014), (801, 26080), (815, 25632), (890, 23472), (978, 21360), (1068, 19560), (1304, 16020), (1335, 15648), (1424, 14670), (1440, 14507), (1467, 14240), (1602, 13040), (1630, 12816), (1780, 11736), (1956, 10680), (2136, 9780), (2445, 8544), (2608, 8010), (2670, 7824), (2848, 7335), (2934, 7120), (3204, 6520), (3260, 6408), (3560, 5868), (3912, 5340), (4005, 5216), (4272, 4890)]