20951820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:240

約数の個数: 144

約数和(自身を含む): 69346368

約数和(自身を除く): 48394548

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, 164, 167, 170, 180, 204, 205, 246, 255, 306, 334, 340, 369, 410, 492, 501, 510, 612, 615, 668, 697, 738, 765, 820, 835, 1002, 1020, 1230, 1394, 1476, 1503, 1530, 1670, 1845, 2004, 2091, 2460, 2505, 2788, 2839, 3006, 3060, 3340, 3485, 3690, 4182, 5010, 5678, 6012, 6273, 6847, 6970, 7380, 7515, 8364, 8517, 10020, 10455, 11356, 12546, 13694, 13940, 14195, 15030, 17034, 20541, 20910, 25092, 25551, 27388, 28390, 30060, 31365, 34068, 34235, 41082, 41820, 42585, 51102, 56780, 61623, 62730, 68470, 82164, 85170, 102204, 102705, 116399, 123246, 125460, 127755, 136940, 170340, 205410, 232798, 246492, 255510, 308115, 349197, 410820, 465596, 511020, 581995, 616230, 698394, 1047591, 1163990, 1232460, 1396788, 1745985, 2095182, 2327980, 3491970, 4190364, 5237955, 6983940, 10475910, 20951820]

約数ペア:

[(1, 20951820), (2, 10475910), (3, 6983940), (4, 5237955), (5, 4190364), (6, 3491970), (9, 2327980), (10, 2095182), (12, 1745985), (15, 1396788), (17, 1232460), (18, 1163990), (20, 1047591), (30, 698394), (34, 616230), (36, 581995), (41, 511020), (45, 465596), (51, 410820), (60, 349197), (68, 308115), (82, 255510), (85, 246492), (90, 232798), (102, 205410), (123, 170340), (153, 136940), (164, 127755), (167, 125460), (170, 123246), (180, 116399), (204, 102705), (205, 102204), (246, 85170), (255, 82164), (306, 68470), (334, 62730), (340, 61623), (369, 56780), (410, 51102), (492, 42585), (501, 41820), (510, 41082), (612, 34235), (615, 34068), (668, 31365), (697, 30060), (738, 28390), (765, 27388), (820, 25551), (835, 25092), (1002, 20910), (1020, 20541), (1230, 17034), (1394, 15030), (1476, 14195), (1503, 13940), (1530, 13694), (1670, 12546), (1845, 11356), (2004, 10455), (2091, 10020), (2460, 8517), (2505, 8364), (2788, 7515), (2839, 7380), (3006, 6970), (3060, 6847), (3340, 6273), (3485, 6012), (3690, 5678), (4182, 5010)]