20803120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{241}}^1$

素因数の和:350

約数の個数: 80

約数和(自身を含む): 52934112

約数和(自身を除く): 32130992

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 83, 104, 130, 166, 208, 241, 260, 332, 415, 482, 520, 664, 830, 964, 1040, 1079, 1205, 1328, 1660, 1928, 2158, 2410, 3133, 3320, 3856, 4316, 4820, 5395, 6266, 6640, 8632, 9640, 10790, 12532, 15665, 17264, 19280, 20003, 21580, 25064, 31330, 40006, 43160, 50128, 62660, 80012, 86320, 100015, 125320, 160024, 200030, 250640, 260039, 320048, 400060, 520078, 800120, 1040156, 1300195, 1600240, 2080312, 2600390, 4160624, 5200780, 10401560, 20803120]

約数ペア:

[(1, 20803120), (2, 10401560), (4, 5200780), (5, 4160624), (8, 2600390), (10, 2080312), (13, 1600240), (16, 1300195), (20, 1040156), (26, 800120), (40, 520078), (52, 400060), (65, 320048), (80, 260039), (83, 250640), (104, 200030), (130, 160024), (166, 125320), (208, 100015), (241, 86320), (260, 80012), (332, 62660), (415, 50128), (482, 43160), (520, 40006), (664, 31330), (830, 25064), (964, 21580), (1040, 20003), (1079, 19280), (1205, 17264), (1328, 15665), (1660, 12532), (1928, 10790), (2158, 9640), (2410, 8632), (3133, 6640), (3320, 6266), (3856, 5395), (4316, 4820)]