20449980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:236

約数の個数: 144

約数和(自身を含む): 67695264

約数和(自身を除く): 47245284

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 41, 45, 51, 60, 68, 82, 85, 90, 102, 123, 153, 163, 164, 170, 180, 204, 205, 246, 255, 306, 326, 340, 369, 410, 489, 492, 510, 612, 615, 652, 697, 738, 765, 815, 820, 978, 1020, 1230, 1394, 1467, 1476, 1530, 1630, 1845, 1956, 2091, 2445, 2460, 2771, 2788, 2934, 3060, 3260, 3485, 3690, 4182, 4890, 5542, 5868, 6273, 6683, 6970, 7335, 7380, 8313, 8364, 9780, 10455, 11084, 12546, 13366, 13855, 13940, 14670, 16626, 20049, 20910, 24939, 25092, 26732, 27710, 29340, 31365, 33252, 33415, 40098, 41565, 41820, 49878, 55420, 60147, 62730, 66830, 80196, 83130, 99756, 100245, 113611, 120294, 124695, 125460, 133660, 166260, 200490, 227222, 240588, 249390, 300735, 340833, 400980, 454444, 498780, 568055, 601470, 681666, 1022499, 1136110, 1202940, 1363332, 1704165, 2044998, 2272220, 3408330, 4089996, 5112495, 6816660, 10224990, 20449980]

約数ペア:

[(1, 20449980), (2, 10224990), (3, 6816660), (4, 5112495), (5, 4089996), (6, 3408330), (9, 2272220), (10, 2044998), (12, 1704165), (15, 1363332), (17, 1202940), (18, 1136110), (20, 1022499), (30, 681666), (34, 601470), (36, 568055), (41, 498780), (45, 454444), (51, 400980), (60, 340833), (68, 300735), (82, 249390), (85, 240588), (90, 227222), (102, 200490), (123, 166260), (153, 133660), (163, 125460), (164, 124695), (170, 120294), (180, 113611), (204, 100245), (205, 99756), (246, 83130), (255, 80196), (306, 66830), (326, 62730), (340, 60147), (369, 55420), (410, 49878), (489, 41820), (492, 41565), (510, 40098), (612, 33415), (615, 33252), (652, 31365), (697, 29340), (738, 27710), (765, 26732), (815, 25092), (820, 24939), (978, 20910), (1020, 20049), (1230, 16626), (1394, 14670), (1467, 13940), (1476, 13855), (1530, 13366), (1630, 12546), (1845, 11084), (1956, 10455), (2091, 9780), (2445, 8364), (2460, 8313), (2771, 7380), (2788, 7335), (2934, 6970), (3060, 6683), (3260, 6273), (3485, 5868), (3690, 5542), (4182, 4890)]